Nike Boys Cool Hbr Comp Long Sleeve (Little Big Kids) Dri-FIT 92% polyester/8% spandex Imported Machine Wash Dri-FIT fabric to wick sweat away and help keep you dry and comfortable Compression fit keeps everything tight to the body for maximum support during high-performance activity. Mesh back panels for breathability/Crew neck for a comfortable fit Flat seams move smoothly against your skin as you train Ergonomic seams and vented hem promote natural range of motion