Under armour af icon 14 zip topthis mens under armour storm icon 14 zip top is a lightweight long sleeve fleece which is breathable stretches for superior mobility the soft inner layer traps heat to keep you warm comfortable whilst the moisture transport system wicks sweat away from the body featuresmaterial polyesterloose fuller cut for complete comfortlightweight armour fleece is light breathable stretchessoft inner layer traps heatmoisture transport system wicks sweat and dries