We recommend maintenance every 1-2 months using the 3 steps below.
STEP 1: Pour 45-50°C hot water over it for about 60 seconds
Place it on a flat surface and pour hot water over the area of concern.
Please avoid pouring hot water while it is propped up or under pressure, as this may cause deformation.

STEP 2: Pour cold water over it for about 15 seconds to set the fluffiness
Tap water temperature is fine.
※On hot summer days, the effectiveness may be reduced as tap water temperature rises.

STEP 3: Dry in a well-ventilated, shaded area
Dry it flat on a flat surface.
Avoid direct sunlight or drying with hot air.
If you want to dry it faster, wrap the pillow in a bath towel and gently shake it up and down to remove excess water.

Please try it for one week. After trying it, if you wish to exchange it, we will accept size exchanges for Brain Sleep Pillows [LOW・STANDARD・HIGH] only, within 30 days of product arrival.
For other products, we do not accept size exchanges, so please be aware.
Exchanges are limited to one time. Please note that re-exchanges or returns after an exchange are not possible.

We also offer the "Brain Sleep Pillow Adjust Sheet" to adjust the height of the Brain Sleep Pillow, providing the best fit at all times according to your physical condition or mood.



If you wish to exchange, please send the following information to the "Contact Form".
※The exchange service is only applicable for purchases made on the BRAIN SLEEP OFFICIAL SITE and BRAIN SLEEP official online stores (Rakuten, Yahoo! Shopping, Amazon).
※When requesting an exchange, we ask for your order number to confirm your purchase history.

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【Order number】:
【Purchased size】:
【Desired exchange size】:
【Period of use ※Please try for at least one week】:
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For size exchanges of Brain Sleep Pillows, the exchange will be handled by simultaneous collection, where you hand your current pillow to the delivery person when the replacement product is delivered.
※We will cover the shipping cost for simultaneous collection.
※Please note that we cannot accommodate exchanges that do not involve simultaneous collection, such as when the product is not in your possession.
※Please continue to use your current pillow cover. If you send it with the replacement product, we cannot return it.
※If you purchased from shopping malls such as Amazon, Rakuten, or Yahoo!, you will need to register as a member on the BRAIN SLEEP OFFICIAL SITE for size exchanges.

It is available on the BRAIN SLEEP OFFICIAL SITE and at some physical stores.
Please check here for details.

When you are concerned about dirt or odor, clean it with shower water.

① Rinse the entire pillow with shower water.
If you are particularly concerned about dirt or odor, use a diluted neutral detergent.

② Air dry in a well-ventilated, flat, shaded area.
If you want to dry it faster... wrap the pillow in a bath towel and gently shake it up and down to remove excess water before drying.

【Precautions when cleaning the pillow body】
Avoid leaning, bending, placing objects on top, or applying pressure during maintenance, as this may cause wrinkles or dents in the pillow.
Do not use hot water above 51℃.
Avoid drying in direct sunlight or with hot air.
Hair products or cosmetics may cause discoloration. Please note that if the material itself discolors, it cannot be restored to its original color even with cleaning.

We recommend choosing the height based on your physique and preference. Generally, STANDARD is recommended. If you prefer a higher pillow, HIGH is recommended, and if you prefer a lower pillow, LOW is recommended.

Place the pillow with the mesh side of the pillow cover facing down and the firm side of the pillow facing up. Adjust the flap of the pillow cover inside, then flip the pillow upside down before use.
※Please use the pillow so that your head rests on the side with the mesh.

The pillow has a mark to distinguish the front and back. Please use the pillow with the marked side facing down. Also, please do not remove the mark.
If you cannot distinguish the front and back, the side with finer, softer fibers is the front, and the side with thicker, harder-feeling fibers is the back. Please feel it to confirm.

When not using the pillow during the day, avoid high temperatures and humidity and store it without applying pressure from above.
Avoid storing it in direct sunlight or in high-temperature areas.