Featuring a built-in intelligent cooling system that works with your body temperature and a hood for additional sun protection, this premium lightweight baselayer is ideal for outdoor work like construction, gardening and farming. It's also a smart choice to wear hiking or camping. Rebar Evolution Hooded Sun Shirt Product Features : 0 : Greater Arm Mobility™ lets you move freelyClimateTEK™ dynamically responds to your body temperature to keep you cool when things heat upFreshTEK™ sustainable odor-resistance, 1 : Chest pocket Men's Rebar Evolution Hooded Sun Shirt in Safety Yellow, Size: Small by Ariat