CUT THE CLINGING - THE UNDER ARMOUR SIRO 1/2 ZIP JACKET.Thanks to Under Armour's Siro Technology, the Under Armour Siro 1/2 Zip Jacket is super-light, dries incredibly fast, and won't cling to you. This fuller cut jacket also features anti-odor technology that prevents the growth of odor-causing microbes, so you can stay working hard and smelling fresh. FEATURES Loose: Fuller cut for complete comfort UA Siro has a unique construction that's super-light, dries incredibly fast & won't cling to you Anti-odor technology prevents the growth of odor-causing microbes Generous A 1/2 zip front with stand collar for easy layeringTECH SPECS 100% Polyester