Transform Your Mornings! The Importance of Choosing a Mattress That Improves Sleep Quality and How to Try Them in Stores

Many people have likely experienced waking up with body aches after sleeping on a mattress that isn't right for them. Sleep, which is said to account for "one-third of our lives," is a vital time for relieving daily fatigue and restoring both body and mind. This time, we'll introduce smart ways to choose a mattress that will improve your quality of life.

What is the role of a mattress?

Mattresses, whether placed on a bed or directly on the floor, are essential for maintaining an ideal sleeping posture. However, the human body has curves, and when you sleep, pressure is strongly applied to four areas: the head, shoulder blades, lower back, and feet. For side sleepers, the spine should be straight, and for back sleepers, the spine should form an S-curve for a natural sleeping posture. Therefore, it is important to choose a mattress that distributes body pressure to reduce the burden on your body.

The necessity of choosing a mattress suited to your body

Mattresses vary greatly in comfort depending on their material, structure, and firmness. Continuing to use a mattress that doesn't suit your body can lead to poor blood circulation and cause back pain and stiff shoulders. Here are three reasons why you need to choose a mattress that is right for you.

1: Back pain prevention and relief

One of the important roles of a mattress is to distribute body pressure and reduce the burden on the body. By choosing a mattress that suits you, it can support the contours of your body, such as your head, shoulder blades, lower back, and feet, and help alleviate back pain.

2: Improved sleep quality

Choosing a mattress with preferred features such as firmness, rebound, stability, breathability, and washability for hygiene will improve your sleeping comfort and enhance the quality of your sleep. Especially in hot summers, a mattress with excellent breathability can help you sleep cool and comfortably.

3: Relief from fatigue and improved quality of life

To relieve fatigue, not only the duration of sleep but also the quality of sleep is important. Using a mattress that suits your body makes it easier to turn over, which can help relieve daily fatigue and improve your quality of life.

Dangers of continuously using a mattress that doesn't suit your body

Let's also learn about the symptoms that can occur if you force yourself to continue using a mattress that doesn't suit your body.

Difficulty turning over, leading to decreased sleep quality

A mattress that is too soft allows the body to sink in and become unstable, requiring muscle effort every time you turn over. This prevents you from relieving fatigue and depletes your physical strength.

Body pressure concentrating on specific areas, causing lower back pain, stiff shoulders, and back pain

A mattress that is too firm can compress the contoured parts of the body, potentially leading to poor blood circulation. This can result in lower back pain, stiff shoulders, and back pain.

Common mattress problems

Continuing to use a mattress that doesn't suit your body can not only prevent you from recovering from fatigue but also cause pain due to strong pressure on the contoured parts of your body. Furthermore, in addition to physical discomfort, many people seem to be troubled by the difficulty of cleaning mattresses.

Morning sluggishness, impact on work

Some people feel tired and sluggish when they wake up, even though they think they've had enough sleep. Insufficient sleep can lead to sudden drowsiness during the day, feeling spaced out, and affecting work performance.

Difficult to wash and dry

Unlike pillows and duvets, large mattresses are difficult to wash. Even if they could be washed, drying them is also difficult, which can lead to dust mites and mold.

Occurrence of dust mites and fleas

Mattresses, where we sleep for long hours every day, absorb a lot of sweat. Despite this, they are difficult to wash, and many people are bothered by the occurrence of dust mites and fleas. Even when exposed to sunlight, mattresses are thick, allowing dust mites and fleas to escape into the interior, which is troublesome.

Mold growth

Many people probably leave their mattresses on the bed because regular drying is bothersome. As a result, sweat and moisture can accumulate in the mattress, leading to mold growth.

Basic structure and types of mattresses

To find the right mattress for you, let's check the basic structure and types of mattresses. While there are differences depending on the brand and product, we will introduce the features of typical 'coil mattresses', 'urethane mattresses', 'fiber mattresses', and 'latex mattresses'.

Highly durable coil mattresses

Characterized by coils used in the internal structure of the mattress. These are the most common type of mattress, available in a wide range of prices and varieties, and excel in durability and breathability. The arrangement and type of coils affect comfort, and a higher coil count is generally associated with better pressure distribution and higher durability. There are two main types: 'Bonnel coils' and 'pocket coils'.

Bonnel Coil Mattress

A mattress constructed with individually spiraled coil springs arranged in a row. It supports the entire body and makes it easy to turn over. However, since the coils are interconnected, there can be a noticeable side-to-side sway, and the vibrations from turning over can easily be transmitted to the person sleeping next to you.

Pocket Coil Mattress

A mattress constructed with each coil spring individually encased in a cylindrical fabric pocket. The independent coils firmly support the body, distributing body pressure according to the body's contours. Compared to Bonnel coil mattresses, they have less lateral sway and high durability. Pocket coil mattresses are often priced higher than Bonnel coils.

There are also many mattresses that do not use coil springs. Among them, we will introduce the popular 'urethane', 'fiber', and 'latex' mattresses.

Urethane mattresses offer excellent cost performance

Mattresses made from urethane, a material used in sponges and insulation, come in two types: 'high-resilience' and 'low-resilience'. They are characterized by high conformity, supporting the entire body with the cushioning properties of urethane.

High-resilience urethane mattresses, as the name suggests, are characterized by their high rebound force. Since the body does not sink in too much, it is easy to maintain a correct sleeping posture, and they also excel in pressure distribution. They are durable and have good breathability.

Low-resilience urethane mattresses offer a sensation of being enveloped, and they conform well to the body even when sleeping on your side, so you don't feel pressure. On the other hand, they can make it difficult to turn over, and maintaining the same posture for long periods can cause shoulder stiffness and back pain. Additionally, because they conform to the body, heat tends to build up, and their breathability is inferior to high-resilience urethane mattresses.

Fiber mattresses for easy cleanliness

A mattress made by weaving polyethylene fibers, it can be easily washed with a shower, making it hygienic. Furthermore, it has excellent breathability and doesn't retain sweat or moisture, so you won't suffer from dust mites, mold, or sweat odor. It has a slightly firm feel similar to a high-resilience urethane mattress, excels in pressure distribution, and allows for proper sleeping posture. It's also easy to turn over, making it recommended for those suffering from stiff shoulders or back pain.

Latex mattresses combine the unique softness and elasticity of rubber

A mattress made from natural rubber sap, it excels in pressure distribution and durability. However, compared to other materials, its breathability is poor, and it can feel stuffy in the summer. Additionally, high-quality natural latex mattresses are often quite expensive.

Choosing based on firmness is important!

The most important factor when choosing a mattress is "firmness." This varies not only by personal preference for comfort but also by sleeping posture and body type.

Firm 'Bonnel coil' and 'fiber'

A firm mattress is recommended for stomach sleepers. It also firmly supports heavier individuals, making it easy to turn over.

Medium-firm 'high-resilience urethane' and 'latex'

It provides stable sleeping comfort and maintains a good sleeping posture, allowing for effortless turning over. While it has a soft feeling that embraces the body, it doesn't sink in, making it recommended for back sleepers and people of average weight.

Soft, sinking 'low-resilience urethane' and 'pocket coil'

It conforms to the body and is flexible, providing a soft and secure sleeping comfort. It is recommended for side sleepers and people with lighter body weights.

Basic guide to choosing a mattress

We've explained the importance and basic information about mattresses, but how do you actually choose one? Here are 7 checkpoints to consider when making your selection.

1: Thickness

Since mattresses are basically placed on a bed or floor, a certain thickness is necessary. The characteristics vary with different thicknesses, so choose according to your preference.

Less than 5cm

Basically, this is a support bedding called a 'mattress topper' used to adjust the comfort when a mattress is uncomfortable. It is generally used in conjunction with your existing mattress, not on its own.

5-9cm or less

This thickness can be used either with a mattress or on its own, and it can also be folded for storage. However, for people with a good physique, there's a possibility that they might feel the bottom.

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10-14cm

While it cannot be folded for storage, it allows even larger individuals to sleep comfortably without feeling the bottom. This is a standard thickness for urethane mattresses.

15cm or more

This is the minimum necessary thickness for coil spring mattresses such as Bonnel coils and pocket coils. For urethane mattresses, thicker ones fall into this category. Choose according to durability, hygiene, and preferred sleeping comfort.

25cm or more

This is a popular thickness for mattresses used on top of a bed. It boasts excellent durability and is recommended for those who want to use it comfortably for a long period. Thicker mattresses tend to be more expensive. However, some may be overly stuffed with cushioning material or appear luxurious without being high quality, so it's important to discern a good quality mattress.

2: Size

Choose the size based on the room's spaciousness and the number of people who will be sleeping together.

Semi-single

Approximately 80-90cm wide, this size is suitable for petite women or children.

Single size

Approximately 100cm wide, this is a common size for one adult to sleep, but well-built individuals might find it a bit cramped when turning over.

Semi-double size

Approximately 120cm wide, this size allows one adult to sleep comfortably. Many people find it a bit cramped for two adults.

Double size

Approximately 140cm wide, this is a common size for two adults, but there may not be enough room to turn over, which can actually feel cramped.

Queen size

Approximately 160cm wide, this size allows two adults to sleep comfortably. There is also enough room to accommodate two adults and one toddler.

King size

Approximately 180cm wide, this size allows two adults and one toddler to sleep comfortably. It's safe for those who want to stretch out their arms and legs, those who toss and turn a lot, or those who frequently change sleeping positions.

3: Quality, durability

Don't forget to check the quality and durability by looking at the product specifications.

For spring type

If you press down with your hand and directly feel the coil springs, or if it makes a creaking sound, the mattress cannot be expected to have good durability or sleeping comfort. Choose one that sinks in moderately. Also, even spring-type mattresses may use urethane in the cushioning layer, so check the material and density.

In the case of urethane

The higher the density, the higher the durability, but also the higher the price. For occasional guest use, a lower density may be fine, but for a mattress used daily, a certain density (30D or higher) is recommended. For low-resilience mattresses, a higher density than high-resilience is said to be necessary, so check before purchasing.

4: Price

Mattresses vary widely in price, from low-cost options to high-end ones costing over 100,000 yen. Here, we will explain the budget for a single size in 5 stages.

Less than 10,000 yen

At a low price, you can buy it from about 10,000 yen, but the quality of the mattress may be poor and it may cause stiff shoulders or back pain, so check the material carefully.

10,000 to 30,000 yen

Many mattresses can be purchased within 30,000 yen even at stores. This price range is also recommended for petite individuals or those not experiencing sleep quality issues.

30,000 to 50,000 yen

If you want to prioritize sleeping comfort at the lowest possible price, a mattress costing around 30,000 to 50,000 yen is recommended. Various types are available, so search for one that suits your preferences.

50,000 to 100,000 yen

If you suffer from stiff shoulders or back pain, consider investing a bit more in a mattress. With a budget of 50,000 yen or more, you can often purchase a mattress that provides satisfying comfort even for those who prioritize sleep quality.

Over 100,000 yen

You can purchase luxury mattresses that are particular about rich functions and sleeping comfort. Recommended for those who have tried various mattresses and want to further pursue sleep quality.

5: Purpose

It's important to choose a mattress based on its intended use, such as whether it will be placed on a bed or directly on the floor, the size of the room it will be in, what body type will use it, and how many people will use it.

6: Sleeping posture

Each person has their own unique sleeping posture habits. Choose a mattress that matches your sleeping posture, whether you sleep on your back, side, or stomach.

7: Material

Each material has different characteristics. For example, fiber is more breathable than urethane. However, many people prefer the soft, body-supporting feel of urethane. Also, urethane supports the body across a surface, while pocket coils support it at individual points, so the preference for sleeping comfort varies here too. It is important to find a material that suits your preference.

More information on how to choose a mattress can be found in this article.

How to choose a mattress? Also explains mattress functions and when to replace it

Key points for a mattress that leads to deep sleep

Here are 6 key points for choosing a mattress that allows for stable and smooth turning over.

1: Body pressure distribution

The body has curves, and when sleeping, pressure is strongly applied to four areas: the head, shoulder blades, lower back, and feet. Since the lower back is particularly prone to pressure, choose a mattress with a structure that distributes body pressure and prevents the lower back from sinking too much.

2: Resilience, elasticity

Mattresses with high resilience and elasticity tend to maintain an ideal posture and make it easy to turn over. High-resilience mattresses are also recommended for people with larger body types or those concerned about back pain and stiff shoulders. If you are petite and prefer a soft, enveloping feel, a softer mattress is fine.

3: Ease of washing

If you prioritize cleanliness or will be using the mattress in an environment where it's prone to getting dirty, a mattress that can be washed with a shower is recommended. Fiber mattresses, in particular, are easy to wash and quick to dry, making them very hygienic. Be careful not to tear urethane mattresses when washing them.

4: Moisture-wicking properties, appropriate temperature

People sweat a lot while sleeping. If the mattress has poor moisture-wicking properties, moisture accumulates, which can disrupt the smooth cycle of perspiration and hinder deep sleep. Furthermore, sleeping at an appropriate temperature improves sleep quality.

5: Can you relax?

Sleep serves the purpose of resting muscles, circulating blood and waste products accumulated during the day to relieve fatigue, and relaxing. Additionally, sleeping with your legs elevated can increase blood circulation by about 150%, which is expected to help recover from fatigue and reduce swelling.

6: Ease of breathing

The structure of the mattress affects how easily you can breathe during sleep. Generally, mattresses that gradually increase in firmness from the center towards the shoulders are said to allow the shoulders to naturally fall inward, making breathing easier. Lie down and check if it suits you.

Points to check when trying in-store

Here are 4 checkpoints to help you find a mattress that suits you when trying it out in a store.

1: How much the lower back sinks and any pressure when lying down

First, lie down and check for comfort, such as whether it feels firm, soft, comfortable, painful, if your lower back is strained, if you feel pressure, or if it's easy to sleep on.

2: How it sinks after 1 minute

It's important not only how it feels immediately after lying down, but also whether it remains comfortable without putting a strain on your body after a while, suggesting a good night's sleep. Pay particular attention to how much your lower back sinks and how closely it conforms to your body.

3: No sinking or pressure even when changing posture

Try turning over, lying on your side, or on your stomach, and check for stability and pressure on your body. If you frequently use your smartphone on the mattress, try that posture as well.

4: Compatibility with your pillow

The compatibility between your mattress and pillow is also important. When trying out a mattress, consider the differences in height, shape, and firmness between the pillow used in the store and your own pillow. Also, if the pillow used when trying out the mattress felt comfortable, it's a good idea to purchase it together.

How to use and care for a mattress to make it last longer

Once you find your favorite mattress, you'll want to use it comfortably for a long time. With a little care, it can last longer, so give it a try.

Regular sun-drying to remove moisture

Aim to air it out in direct sunlight regularly, roughly once every 2-3 months. This helps remove moisture and odors.

Switching the head and foot ends

If you use the mattress in the same direction, only one area will wear out easily, so rotate the mattress from head to foot every 2-3 months. If your mattress is reversible, flipping it over as well will extend its life even further.

Utilizing a mattress pad

There are various types of mattress pads, but it is recommended to use a mattress pad that adjusts the comfort of a firm mattress or springs, combined with a sweat-absorbing pad that prevents sweat stains and odors on the mattress. Since pads that adjust comfort are often not washable, placing a machine-washable sweat-absorbing pad on top of it is hygienic.

Use a washable mattress

Fiber mattresses, made by weaving polyethylene, not only absorb less sweat and moisture but can also be completely washed at home with a shower, making them very hygienic. They also have good breathability and are less prone to dust mites and mold. They are recommended for those suffering from house dust or allergies.

What is the lifespan of a mattress?

Even if you find your favorite mattress, it may sag and wear out over time, becoming unsuitable for your body. The lifespan is just a guideline, so if you notice a change in how it feels, replace it.

Bonnel coil mattresses, pocket coil mattresses…10 years

Spring-type Bonnel coils and pocket coils are characterized by their high durability, with a lifespan of approximately 10 years. If you feel the springs sagging or creaking, or if the cushioning is gone and the coils press against your body, it's time to replace it.

High-resilience urethane…8 years

Higher resilience tends to last longer. When it becomes softer than when purchased and you no longer feel the rebound force, it's time to replace it.

Low-resilience urethane…5 years

Mattresses with a soft sleeping surface often have a shorter lifespan than other materials. Replace your mattress when you notice significant sagging.

Fiber mattress…6-8 years

Replace your mattress when you notice sagging or feel it has become harder than when you purchased it.

Latex mattress…10 years

If the elasticity diminishes compared to when you bought it and you start waking up with body aches, it's time to replace it.

Mattress trivia

We've covered the characteristics and ways to choose various mattresses, and finally, we'll discuss the differences between mattresses and futons, and how to dispose of mattresses.

Differences between mattresses and futons

Let's consider the pros and cons of mattresses and futons.

Advantages and disadvantages of mattresses

Basically, they can be left as is, saving effort, and their height prevents cold from the floor and reduces dust inhalation. Additionally, the advantage is being able to get up without straining your back and legs. There are also foldable mattresses to make efficient use of room space. However, they are often more expensive than futons, and disposal can be difficult.

Advantages and disadvantages of futons

They are easy to carry, so you can sleep in your favorite space and store them when not in use. Additionally, they can be easily air-dried in the sun, ensuring a comfortable sleep. However, they require storage space and it can be a hassle to set them up and put them away every night. Furthermore, they are often firm to sleep on and sleeping at a low height means they are prone to inhaling dust, which are their disadvantages.

How to dispose of a mattress?

Old, unwanted mattresses cannot be thrown away as general waste, so you will need to request pickup from your local municipality or a private disposal company. If you request from the municipality, you will need to purchase a pickup ticket and transport the mattress to a designated location, which can be a hassle. Private companies will pick it up from your home, but the cost is often higher compared to municipal services.