All-Night Cooling Comfort: Made with 60% rayon derived from bamaboo and 40% polyester, these temperature-regulating Cooling sheets wick moisture 3x faster than cotton. The breathable fabric prevents sticky night sweats while maintaining perfect airflow - ideal for hot sleepers year-round. Premium viscose from bamboo stays consistently cool to the touch. Silky Soft & Comfortable: Stronger than cotton and wrinkle-free, these sheets feel like sleeping on silk. The upgraded fabric outperforms standard sheets in tear resistance. OEKO-TEX 100 certified so your family sleeps safe and comfortable! 2.5cm Widen Elastic Band Design: Features a reinforced 2.5cm (1-inch) wide elastic band - 212% wider than standard sheets - that securely grips mattresses up to 16" thick. Specially engineered to prevent corner popping or sliding, even for restless sleepers. Compatible with all mattress types including memory foam, pillowtop, and innerspring. Complete California King Size Bedding Set: 1 fitted sheet (72"x84"x16" pocket), 1 flat sheet (108"x102"), and 2 pillowcase (20"x40"). Our dedicated support team provides 24/7 weekday assistance for any product inquiries. Easy Care & Lasting Quality: No fuss, no wrinkles - just toss these sheets in the washing machine! Cold water gentle cycle keeps them looking fresh for years. (Pro tip: Skip the bleach and fabric softener to maintain that like-new softness). For best results, use low-temperature ironing when needed. PHF B/P Cooling Sheets Set