New, never used. Flat sheet only, king/cal king size. I don’t use the flat sheet, still in the box I’ve never used. SHEEX - Original Performance Sheet. Ultra-Soft Fabric Cooling and Breathes Better Than Traditional Cotton - Arctic Blue. Material 87% Polyester/ 13% Spandex. Moisture-wicking, breathable structure: The SHEEX Original Performance Sheet offers offer superior ventilation to maximize air and moisture release—which helps reduce sweating by keeping your body cool all night long. Innovative Sleepfit Technology: Featuring thermoregulating quick-drying temperature control, our lightweight performance fabric helps keep body temperature low by wicking away moisture—breathing better than stuffy tightly-woven high-thread-count cotton. Cutting-edge engineering Utilizing a ridiculously soft athletic fabric, our elastic-lined fitted sheet, flat sheet and 1 pillowcases feel incredibly silky on your skin, which soothes you into a tranquilly peaceful night of revitalizing sleep. Long-lasting, wrinkle-free durability: Our lustrous sheet set and pillowcases get softer with every wash. Engineered not to shrink, fade or pill, cold water, no bleach or fabric softener and a low tumble dry with no dryer sheet easily cares for them. Luxurious sweat-free sleeping: SHEEX is a cutting-edge performance bedding company that lets your slumbering body naturally cool itself, which helps reduce night sweating by creating rejuvenating coziness that supports deeper, more restorative sleep.