BRAIN SLEEP WEAR PERFECT COOL

The highest level of contact cooling × moisture-absorbing coolingSleepwear engineered for ultimate coolness Ranked No.1 in the summer bedding category on the crowdfunding platform Makuake, drawing on the technologies developed through the PERFECT COOL series Designed for comfort through prolonged midsummer heat An innovative cooling sleepwear is introduced! In 2023, Japan recorded its highest average temperature on record. As nights in Japan grow increasingly subtropical, sleepwear emerges as a practical solution. Sleepwear that brings comfort to nights of relentless heat. Sizes: S / M / L / XL Colors: Black / Medium gray Purchase now TECHNOLOGY 01Ultimate dual cooling through contact cooling and moisture-absorbing cooling 02Antibacterial and deodorizing treatment for everyday cleanliness in summer 03A design that avoids constriction, enhancing comfort without tightening the body 01PERFECT COOL 01PERFECT COOL Ultimate dual cooling through contact cooling and moisture-absorbing cooling Instant contact cooling upon wearing, combined with moisture-absorbing cooling that activates during sleep, supports comfort throughout the night. Yarns and fabrics developed in pursuit of ultimate cooling The core of the yarn is made from cooling nylon, surrounded by polyethylene with even higher cooling performance, resulting in an ultra-fine yarn composed of approximately 100 filaments. This ultra-fine yarn is then woven together with nylon and polyurethane yarns using a proprietary knitting technique. Dual cooling technology: Contact cooling Peak contact cooling performance from the moment of wear Cooling performance: 260% A proprietary cooling fiber is used, achieving a contact cooling value of 0.524, the highest level, for exceptional cooling performance. *Contact cooling (Q-max: W/cm2) Based on a reference value of 0.2, the cooling performance is approximately 260%. Dual cooling technology: Moisture-absorbing cooling Peak cooling of up to −7.7°C driven by in-bed moisture The ultimate moisture-absorbing cooling A specialized material absorbs humidity and perspiration generated during sleep, lowering temperature as moisture is taken in. Effective cooling performance continues through the night, with cooling functionality confirmed even after 50 wash cycles. In the test, participants wore the sleepwear, and a mist was applied to simulate perspiration. Surface temperature was then measured using thermography, resulting in a temperature of 26.3°C, which corresponds to the ideal in-bed sleeping environment. (Mist application: 60 sprays, approximately 6.5 g of water) Absorbing moisture and efficiently converting it into cooling This innovative technology delivers cooling while reducing clamminess, helping maintain comfort during sleep. In testing, when the moisture-absorbing component was immersed in water on the right side, a decrease in water temperature was confirmed. 02SUPER CLEAN 02SUPER CLEAN Antibacterial and deodorizing treatment for everyday cleanliness, even in summer Easy to wash at home, with reliable antibacterial and deodorizing performance that helps maintain cleanliness day after day. Designed for everyday wear, antibacterial and deodorizing performance matters The fabric is treated with antibacterial and deodorizing processing to help prevent bacterial growth during the summer months. Highly effective and wash-durable Delivering 2.5 times the antibacterial deodorizing standard (antibacterial activity value: 2.2), with effectiveness maintained even after 10 wash cycles. Stress-free comfort through a dual-layer fabric construction The side that touches the skin is smooth, reducing friction while incorporating a cooling fabric with moisture-diffusion properties. The outer layer uses 100% cotton with high moisture absorbency, offering a gentle feel on the skin and an efficient design that disperses humidity. During summer sleep, perspiration is said to exceed 500 ml, yet this highly moisture-diffusive fabric supports a comfortable sleeping environment. Reducing uncomfortable clamminess during sleep By combining materials with high moisture absorbency and moisture-diffusion performance, humidity—one of the primary causes of sleep disruption—is efficiently absorbed and released. This helps regulate moisture levels effectively, supporting continued comfort even when perspiration occurs. 03RELAX& COMFORT 03RELAX& COMFORT A non-constricting design for enhanced comfort Designed with a relaxed fit, including elasticated areas that minimize pressure on the body. This allows for ease and relaxation without interfering with natural movement during sleep. A non-constricting design for more comfortable sleep Designed to support comfort during pre-sleep relaxation and to avoid interfering with natural movement during sleep. Larger armholes are incorporated, and excessive pressure from elastic or ribbing is minimized, helping maintain a comfortable range of motion and reduce stress throughout the night. By reinforcing the neckline, the design helps prevent deformation and stretching, maintaining a clean, well-defined neckline. The T-shirt hem features a gentle curve, with side slits on both sides to add a light, airy feel. Resistant to transparency, even when worn alone Less prone to visible perspiration marks The dual-layer fabric construction reduces transparency even when worn on its own and helps minimize visible perspiration marks. This allows for easy wear and a design suitable for brief outings as well. Perspiration visibility test When mist was applied to the inner side to simulate perspiration, no visible staining appeared on the outer surface. SPECSpecifications COLOR Available in two colors: Black and Medium Gray UNISEX SIZE A unisex size designed to fit all genders, ages, and body types. Male model: 180cm / L size Female model: 166cm / M size ◾️Size Guide (Unisex) （CM) ◾️Size Guide (Unisex) ◾️ Product Measurements ◾️ Materials Outer fabric: Cotton 100% Inner fabric: Blended fibers (Polyethylene / Nylon) 46% / Nylon 44% / Polyurethane 10% The most comfortable summer sleep RELATED PRODUCTS For those seeking a more advanced level of cooling The PERFECT COOL SERIES PILLOW PERFECT COOL(with cover) A pillow equipped with an ice pack, effectively cools the head even during intense summer heat. Learn more PILLOW COVER PERFECT COOL EX A pillow cover that can be easily fitted to an existing pillow, efficiently cools the head during sleep. Learn more COMFORTER PERFECT COOL EX A summer comforter delivering ultimate cooling through a triple cooling technology combining contact cooling, moisture-absorbing cooling, and sustained cooling performance. Learn more MATTRESS PROTECTOR PERFECT COOL EX A mattress box sheet made with PERFECT COOL fabric, featuring a full elastic edge design for easy attachment and removal. Learn more BRAIN SLEEP WEAR comparison chart FAQFrequently asked questions Is it washable? Yes. This product is machine washable. Please place it in a laundry net and wash with water. As the fabric is a dark color, wash separately from white or light-colored items. Avoid using bleach (both chlorine- and oxygen-based). Can I tumble dry? No. Please avoid tumble drying. Hang to dry in a shaded area, avoiding direct sunlight. Can I iron it? Ironing is not recommended, as high temperatures may cause fabric damage. Is it prone to sweat stains? The side that comes into contact with the skin features a dual-layer structure made with highly absorbent and moisture-diffusing materials, making sweat stains less noticeable. What colors are available? Black and charcoal Gray. How should I choose my size? This product comes in a unisex size with a relaxed fit. Please refer to the size guide on the product page to select your preferred size. What seasons is it suitable for? This wear is designed primarily for warmer seasons. With its cooling functionality and short-sleeve top and half pants design, it is ideal for summer and hot, humid nights.