Yes, upon your next purchase, you can exchange your old pillow for a new one with a ¥10,000 discount.
Please check here for details.
*Web purchase and member registration are required.

We recommend maintenance every 1-2 months following these 3 steps:
STEP 1: Pour 45-50°C water over it for about 60 seconds.
Place it on a flat surface and pour water over the areas you are concerned about.
Please refrain from pouring water while it is propped up or under pressure, as this may cause deformation.

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

STEP 3: Dry in a well-ventilated shaded area.
Lay it flat to dry.
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 first. If you wish to exchange it after trying it, we offer size exchanges for Brain Sleep Pillow [LOW・STANDARD・HIGH] within 30 days of product arrival.
Please note that we do not accept size exchanges for any other products.
Exchanges are limited to one time only. Please note that re-exchanges or returns after an exchange cannot be accepted.

We also offer the "BRAIN SLEEP PILLOW ADJUST SHEET," which allows you to adjust the height of your Brain Sleep Pillow to always provide the best fit according to your physical condition and mood.



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

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Order Number:
Purchased Size:
Requested Exchange Size:
Usage Period *Please try for at least 1 week:
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For size exchanges of the Brain Sleep Pillow, we will arrange for simultaneous collection, where you hand over your current pillow to the delivery person when the replacement product is delivered.
*The shipping fee for simultaneous collection will be borne by us.
*Please note that we cannot accommodate exchanges other than simultaneous collection, such as when the product is not in your possession.
*Please continue to use your pillow cover. If you send it back with the replacement product, we will not be able to return it to you.
*If you purchased from shopping malls such as Amazon, Rakuten, or Yahoo!, you must register as a member on the BRAIN SLEEP OFFICIAL SITE for size exchanges.

You can also purchase at retail stores. Product availability may vary by store, so
please check here for details.

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

① Rinse the entire pillow with shower water.
If dirt or odor is particularly bothersome, use a diluted mild detergent.

② Air dry in a well-ventilated, flat area, away from direct sunlight.
If you want to dry it faster: Wrap the pillow in a bath towel, gently shake it up and down to remove excess water, then dry it.

[Precautions when cleaning the pillow body]
Avoid maintaining the pillow by propping it up, bending it, placing objects on it, or applying pressure, as this may cause creases or indentations in the pillow.
Do not use water hotter than 51°C.
Avoid drying in direct sunlight or with hot air.
Hair products or cosmetics may cause discoloration. Please note that if the material itself has discolored, it cannot be restored to its original color even with cleaning.

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

See how to choose the right pillow for you

Place the pillow cover with the mesh side facing down and the firm side of the pillow facing up. Adjust the pillow cover flap inside, then flip the pillow upside down to use it.
*When using the pillow, ensure your head rests on the side with the mesh.

The pillow has markings to distinguish the front and back. Please use the pillow with the marked side facing down. Also, please do not remove the markings when using it.
If you are unsure which is the front or back, the side with finer, softer fibers is the front, and the side with thicker, harder fibers to the touch is the back. Please feel it to confirm.

When not using the pillow during the day, store it away from high temperatures and humidity, without placing any weight on it.
Avoid storing in direct sunlight or in high-temperature locations.