Skins Men's Cycle Compression Baselayer Long Sleeve Top Nylon 76% / Spandex 24% Imported 76% Nylon, 24% Spandex Specially placed mesh panels designed specifically for zipper opening in C400 jerseys for maximum temperature regulation Lead the pack. Engineered Dynamic Gradient Compression in your chest and arms boosts power, stamina, and endurance when worn with loose-fit jerseys. Cold machine wash, gentle cycle, with like colors. Do not bleach, iron, or tumble dry.