We took the lightweight fleece you know and love, reinforced high-wear areas (like the shoulder seams!) and the result is a sweatshirt that's perfect for year-round wear. The thoughtfully placed seams are designed to let you move freely on and off the jobsite. Rebar Lightweight Sweatshirt Product Features : Greater Arm Mobility™ helps extend arm and shoulder range-of-motion so you can move freely, Reinforced shoulder seamsRibbed collar, cuffs, and hem Men's Rebar Lightweight Sweatshirt in Heather Grey, Size: XS by Ariat