Soft, 100% cotton flat-back rib (8.55 oz/yd²/290 gsm). Our flat-back rib fabric has a subtle texture and a unique heathered appearance. Mock neck, quarter zip design with a metal zipper and leather pull. Open cuffs & hem and side-seam vents for a comfortable fit. Features a unique, invisible blind stitched hem that provides a clean, finished appearance allowing the stitching to blend into the fabric. Charles River brand.