KURUKURU Co., Ltd. (Headquarters: GINZA SIX 13F, 6-10-1 Ginza, Chuo-ku, Tokyo; Representative Director: Yasuhiro Sekizawa), the Japanese bedding brand "GOKUMIN," has launched a new color, "Light Gray," for its waterproof mattress protector, "Waterproof Protector," which protects mattresses from dirt and moisture. This new color, designed to blend into bedrooms, became available on July 2, 2026. (Available in 2 colors, including the existing black, and 3 sizes). "Mattresses cannot be washed, yet they are exposed to sweat and moisture daily." "Even if dirt and odors are a concern, they cannot be easily replaced." — Focusing on these hygiene issues with mattresses, this product features a special two-layer structure with a TPU waterproof membrane laminated to the back of the fabric, achieving "waterproof yet breathable." It combines waterproof performance with a water resistance of 6,000mm and high moisture permeability, along with features like antibacterial and deodorizing treatment and 0% dust mite penetration (anti-mite test by a third-party testing organization), all condensed into a single sheet like a fitted sheet to keep your daily sleep clean. ■ Developer's Thoughts and Background Bedding is a household item that is in contact with the skin for the longest duration each day. However, while pillowcases and sheets can be washed frequently, the base mattress cannot be washed. Mold, dust mites, dust, night sweats, children's nocturnal enuresis, pet hair, and home care — mattresses get dirty more easily than imagined, and once stains soak in, they cannot be removed, shortening the lifespan of your valuable bedding. "Waterproofing makes it stuffy." "Preventing stuffiness lets water through." Many protectors have compromised on these conflicting challenges. GOKUMIN pursues a single product that achieves both breathability and waterproofing without compromise. Even if it costs a little more, placing a "good sheet" made with attention to function and materials over you