While most companies' "heavyweight" sweatshirts use a 10-13oz. fabric, Arborwear redefines the category by pairing two layers of 13oz. cotton fleece to create the Men's Double Thick Pullover Hoodie. The result is an ultra-warm hoodie that still offers the mobility and breathable comfort you expect from a sweatshirt. Gusseted armpits offer greater mobility when you're working away, and its oversized hood fits comfortably over your hardhat to shield your head from frigid conditions.