Skins Men's A400 Sleeveless Top 76% Nylon, 24% Spandex Core stability: Memory MX fabric maximises your stability and control while improving posture and breathing efficiency. Built for motion: Hem gripper around the waist, stretch airflow mesh around the torso, and Memory MX panels over the spine and scapula ensure maximum comfort and support in any activity. Cold machine wash, gentle cycle, with like colors. Do not bleach, iron, or tumble dry.