SHEEX - ORIGINAL PERFORMANCE Sheet Set with 2 Pillowcases, Ultra-Soft Fabric Transfers Body Heat and Breathes Better than Traditional Cotton, Espresso (King/Cal King) 87% Polyester/ 13% Spandex Imported Super-Soft Touch: Our lightweight fabric is ultra-soft and feels incredibly smooth against your skin Precision Fit: Hassle-free fabric with flexible microfibers enhances mattress fit Quick-Dry: Wicking properties keep you dry throughout the night Temperature Control: Fabric releases trapped body heat, keeping you cooler than traditional cotton Breathability: Nearly 50% more breathable fabric than traditional cotton, offering superior comfort