Willarde Men's Long Sleeve Baselayer Compression Shirts 86% Polyester 14% Spandex Imported 30+ UPF protects your skin from the sun's harmful rays 4-way stretch fabrication allows greater mobility and maintains shape Breathable and moisture-wicking fabrics keep you dry and comfortable Smooth fabric provides extreme comfort and compression without restriction The fabric is made of 86% polyamide and 14% spandex, which is close-knit, elastic, smooth , comfortable and of wearability.<br> Quick-dry: The fabric gets dry much faster than general fabric for the special elasticity and structure, which fits body closely. <p></p> Sweat-wicking: We apply with special design and technique to produce micro-groove fiber and unique fabrics . It wicks sweat from the skin to the fabric exterior promptly, which wicks faster than general fabric for 5 times .