Let the workday begin. Our heavyweight zip-mock sweatshirt is made of 13-ounce, 80% cotton / 20% polyester fabric, it features spandex-reinforced rib-knit cuffs and waistband, a mock collar with an 8" antique brass zipper, a non-banded, open bottom with side-finished side slits and a locker loop for storage. *Mock collar, heavyweight *Side slits *Heavyweight.