【Renewed】BRAIN SLEEP PILLOW
.rn__intro__item__title { font-size: 26px; } .rn__section__text { line-height: 1.5; top: 17.53125vw; } @media (max-width: 749px) { .rn__concept { font-size: 20px; } .rn__intro__ite m__title { font-size: 20x; } .rn__section__text { top: 10vw; font-size: 6.5vw; line-height: 1.5; } .chart.accordion_item .accordion_item__question { background-size: 16px !important; background-position: center right 6px !important; } } The science of how you sleepA pillow born from Brain Sleep. Our exclusive heat-release design*Releases the heat that builds up around your head for deeper, higher-quality sleep. Thanks to a special, highly breathable material, your head stays free of trapped heat — supporting a drop in core body temperature and helping you fall into deep, restful sleep. *Patents No. 7365060, No. 7745273, and No. 7711922 are held by Eco World Co., Ltd. and were developed jointly with our company. A fit that goes beyond made-to-order — backed by patented technology. Our patented 3-layer, 9-gradation structure begins molding to the shape of your head the moment you start using it, creating the feeling of finally meeting a pillow made just for you. SCIENCE & EVIDENCE How Sleep Works SCIENCE OF BETTER SLEEP The science behind changing your sleep quality What determines your sleep quality is the "first 90 minutes." The quality of a full night's sleep is shaped by the first 90 minutes after you fall asleep. Born from the method behind the bestseller The Stanford Method for the Ultimate Sleep,* the Brain Sleep Pillow is the only pillow designed around this "The golden 90 minutes." *Developed based on insights from the book. (Excerpted from The Stanford Method for the Ultimate Sleep, Sunmark Publishing) EVIDENCE ON SLEEP QUALITY Evidence on sleep quality A higher proportion of deep sleep* Compared with typical functional pillows, the Brain Sleep Pillow shows a higher proportion of deep sleep during the first 90 minutes — the window that determines overall sleep quality. *Based on our company's own research (comparison with typical functional pillows), confirming an approximately 7.6-point improvement. Individual results may vary. Brainwave measurements during sleep Proportion of deep sleep* in "the golden 90 minutes" (first sleep cycle) MORE EVIDENCE OSA Sleep Inventory survey results The OSA Sleep Inventory is a psychological scale for assessing subjective sleep quality upon waking. Noticeably improved drowsiness, ease of falling asleep, and morning freshness Compared with typical functional pillows, the Brain Sleep Pillow scored higher on subjective ratings of drowsiness, ease of falling asleep, and how refreshed users felt the next morning. Change in core body temperature by pillow type A breathable material that lowers core body temperature A drop in core body temperature is considered essential for quality sleep. By releasing heat from the head, the Brain Sleep Pillow keeps core body temperature about 0.16°C lower on average compared with typical functional pillows. Change in sleep quality by pillow fit Whether or not a pillow has a gradation structure produces a significant difference in sleep latency, nighttime awakenings, and sleep efficiency. A better-fitting pillow supports better-quality sleep. Change your pillow, change your morning FEATURE 01Heat-release design for deeper sleep 02Personal-fit structure 03Outstanding durability 04Clean performance — washable with water 05Uncompromising quality and peace of mind 01 DEEP SLEEP Heat-release design for deeper sleep Release the heat trapped around your head, for deeper sleep Releasing heat from the head is essential for deep, high-quality sleep. Since the Brain Sleep Pillow is made of more than 90% air, the heat and moisture generated during sleep doesn't get trapped inside the pillow — supporting higher-quality sleep. High heat dissipation, no trapped heat Trapped heat can affect sleep quality. Thanks to its breathable material, our product resists trapping heat compared with other materials, supporting a comfortable sleep environment. Change in heat dissipation MORE EVIDENCE Thermographic imaging of head surface temperature A cooler head Thermographic imaging makes it clear at a glance: the Brain Sleep Pillow keeps head temperature lower than other materials. 02 PERSONALIZED FIT Personal-fit structure A pillow made just for you, thanks to patented technology Our patented 3-layer, 9-gradation structure gradually adapts to your head size and sleeping style. The more you use it, the more it becomes a pillow tailored to your sleep. Fits you more with every use. Reduces strain on the head and neck. Old model This product Test method: Head pressure distribution measured on Day 1 of pillow use.Subject: adult male, height 168 cm, weight 68 kg. Supports every sleeping position Because resilience increases toward the sides, your head won't sink too far when sleeping on your side, so your sleeping posture stays stable. It fits any position — on your side, on your stomach, or otherwise — and the 9-gradation structure also supports smooth turning during sleep. 03 MATERIAL Outstanding durability A fit woven from air A proprietary fiber lets us design thickness and firmness by area — soft where your head rests, firm where it supports your neck and temples — creating the ideal fit for the shape of your head. Durability built to last Durability is a top concern for a pillow you use every day. Our product has demonstrated high durability in tests simulating roughly six years of use (43,200 compression cycles), maintaining a stable sleeping feel over the long term. *Years of durability may vary depending on how the product is used. *Results shown are for the Brain Sleep Pillow Standard. Durability Test Test method: Based on the JIS durability test standard for mattresses, using our own in-house criteria. An Amsler-type testing machine applies repeated loads equivalent to head weight, and thickness is measured after compression to calculate the residual compression set (flattening rate). The number of compression cycles is calculated assuming roughly 20 turns per night. 04 SUPER CLEAN Clean performance, washable with water Wash it clean with water People are said to sweat about a cup's worth (roughly 200 ml) during sleep. The Brain Sleep Pillow can be easily rinsed clean in the shower and dries quickly, so it stays clean at all times. MORE EVIDENCE Number of dust mites bred after using the pillow for 1 year Minimal dust mites growth Compared to other materials, BRAIN SLEEP pillow shows a significantly lower level of dust mite development.This makes it a considerate option for those sensitive to house dust and for households with small children. Restore its fluffiness in the shower If the pillow's height starts to feel off, a shower at 45–50°C will plump it back up. *Shower care does not restore the pillow to its exact original, brand-new condition. Please understand this in advance. 05 MADE IN JAPAN Uncompromising quality and peace of mind Craftsmanship you can trust — Quality you can count on At Brain Sleep, our engineers and artisans check quality by hand, piece by piece, repeatedly. After passing strict quality inspections, each pillow is carefully packaged and delivered to you. Made with pure natural spring water to prevent quality degradation We use spring water from Shimizu Bakuen, one of the "15 Best Natural Waters of Oita," a special soft water with minimal impurities. Using water with fewer impurities in our manufacturing process helps avoid unwanted chemical reactions and prevents quality degradation. A production process where you can see the craftsperson's hand at every step MOVIE SPEC SIZE The Brain Sleep Pillow comes in three heights. LOW STANDARD POPULAR HIGH Size comparison chart SUSTAINABLE 100% recyclable, sustainable material Our pillows use 100% renewable, earth-friendly materials. We are committed to pursuing sustainable materials with the environment in mind.Material: 100% polyethylene COVER Choose from two dedicated cover options. Active Air An exceptionally breathable mesh material. Quick-drying, so it always feels crisp and dry. Breathability Antibacterial Odor-resistant Absorbent and quick-drying Deodorizing Anti-static Mold-resistant Pollen-shedding Tumble-dryer safe 100% polyester Organic Sleep 100% natural organic cotton. For those who prioritize a soft touch. Antibacterial & Odor-resistant Deodorizing Absorbent and quick-drying Anti-static Mold-resistant Pollen-shedding Hybrid catalyst 100% cotton HIGH / STANDARD / LOW Shop now FAQ Where is the pillow manufactured? It's made in Japan, manufactured in Kusu Town, Oita Prefecture. The material is 100% polyethylene fiber, a recyclable, sustainable material. How firm is the pillow? The 100% polyethylene fiber material is a high-resilience material in which countless fibers act like tiny springs. Unlike cotton or polyurethane, which sink softly under weight, it's characterized by firm, springy support for your head. That said, the Brain Sleep Pillow is different from a typical polyethylene pillow. Its unique 3-layer, 9-gradation structure is soft in the center and gradually firmer toward the edges, creating a natural fit that doesn't feel like the material's inherent firmness. Because it conforms to your head whether you sleep on your back or your side, users often describe it as offering "a new kind of feeling — springy resilience combined with a soft, enveloping fit." It also gradually molds to your own head shape and sleeping posture the more you use it, so even if it feels firm at first, it becomes more and more comfortable and personalized to you with continued use. If I feel the pillow's height isn't right after purchase, can I exchange it for a different size? In general, we recommend STANDARD. If you prefer something taller, choose HIGH; if you prefer something lower, choose LOW. See how to choose the pillow that's right for you How long is the warranty period? The warranty period is one year. If there is a quality issue with the product, we will address it within the warranty period. How long can I use the Brain Sleep Pillow? It has demonstrated high durability in tests simulating roughly six years of use (43,200 compression cycles). You can also take advantage of our Eco Cycle Program, which lets you exchange your pillow for a new one at ¥10,000 off your next purchase. How do I wash the pillow? Can the Brain Sleep Pillow be washed with water? When you're concerned about dirt or odorRinse the entire pillow with shower water. If dirt or odor is a particular concern, use a diluted neutral detergent. After washing, dry it flat in a well-ventilated, shaded area. If you want it to dry faster, wrap the pillow in a bath towel and gently shake it up and down to remove excess water before drying. When the height starts to feel off (once every 1–2 months)STEP 1: Pour 45–50°C hot water over it for about 60 secondsPlace the pillow flat and pour hot water over the areas of concern. Avoid pouring water while the pillow is propped up or under weight, as this may cause it to deform.KSTEP 2: Pour water over it for about 15 seconds to set the fluffinessRegular tap water temperature is fine. *On extremely hot summer days, tap water temperature may rise, reducing the effect.STEP 3: Dry it in a shaded, well-ventilated placeLay the pillow flat to dry. Avoid direct sunlight or warm-air drying. If you want it to dry faster, wrap the pillow in a bath towel and gently shake it up and down to remove excess water. We also offer the "Brain Sleep Pillow Adjust Sheet," which lets you fine-tune the height of your Brain Sleep Pillow so it can always provide the best fit, no matter how you're feeling that day. [Common precautions for care and maintenance] Avoid caring for the pillow while it's propped up, folded, has something placed on top of it, or is under weight, as this can cause wrinkle-like lines or dents. Do not pour water hotter than 51°C onto the pillow. Avoid drying it in direct sunlight or with warm air. Hair products or cosmetics may cause discoloration. Please note that once the material itself has discolored, care and cleaning cannot restore its original color. Can I wash it in a washing machine or dryer? The pillow cannot be washed in a washing machine or dryer, or ironed. Doing so may damage the material and impair its performance. Please clean it by rinsing with shower water instead. Does the pillow have a front and back? Which side should face up? The pillow has a marker to indicate its front and back. Please use it with the marked side facing down, and don't remove the marker. If you can no longer tell which side is which, check by touch: the side with finer, softer fibers is the front, and the side with thicker, firmer-feeling fibers is the back. Which pillow cover would you recommend? You can choose based on the sleeping feel you're looking for. Active Air: Prioritizes breathability. Recommended for those concerned about heat or night sweats. *Because of its mesh structure, it may leave marks on your cheek when sleeping on your side. Organic Sleep: A gentle touch derived from organic cotton. For those who prioritize the feel of natural materials. Perfect Cool EX: A cool-to-the-touch type. Recommended for summer or for those who tend to feel hot. How do I put the pillow cover on correctly? Place the pillow with the mesh side of the cover facing down and the firmer side of the pillow facing up. After tucking in the cover's flap to adjust it, flip the pillow over before use. *Please use the pillow so that your head rests on the side with the mesh. How should I store the pillow if I won't be using it for a while, such as during travel? Even during the day when you're not using the pillow, store it somewhere that avoids high heat and humidity, and don't place any weight on top of it. Avoid storing it in direct sunlight or in places that get hot. ✖ For Those Unsure How to Choose the Right Pillow Key Point 1: Understanding the Ideal Pillow Height ✓ The eyes naturally face slightly downward ✓ The neck and shoulder muscles remain relaxed ✓ The throat is not compressed, allowing easier breathing A pillow that is too high or too low can put strain on the neck.If the back of the head is elevated, the neck may be compressed, leading to stiffness, discomfort, or even snoring.Conversely, a pillow that is too low cannot support the head properly and increases the load on the neck and shoulders.For an ideal sleeping posture, the head and neck should form an incline of about 10–15 degrees when lying on the back, with the head positioned slightly—about 0–5 degrees—below the face. Key Point 2: Back sleeper or side sleeper? Choosing the right pillow based on your sleeping position When sleeping on the side, the ideal pillow height is one that allows the cervical spine to maintain a gentle S-curve, similar to when standing upright.Choosing a pillow height close to the thickness of the shoulder helps achieve proper alignment. For back sleepers, the ideal pillow height is one that keeps the line from the head to the upper back straight, as it would be when standing.A height close to the thickness of the shoulder generally provides the best fit.Some people who prefer the Low height when sleeping on their back may find the Standard height more suitable for side sleeping. RELATED PRODUCTS BRAIN SLEEP PILLOW PERFECT COOL Keep your summer sleep cool Comes with an ice pack to keep your head cool even in the height of summer. Shop now BRAIN SLEEP PILLOW NECK CONDITIONING A natural curve for your neck / Support your body while you sleep Designed with input from a sleep-specialist acupuncture and massage studio, this pillow supports the natural curve of your neck. By stretching the neck and relaxing head tension, it reduces strain around the neck. Shop now BRAIN SLEEP PILLOW SNORELESS Designed with snoring concerns in mind / Encourages side-sleeping for comfortable rest A gentle crown-wave shape encourages side-sleeping and supports easy breathing. The crown wave keeps you consistently positioned on your side, guiding you toward smoother breathing throughout the night. 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