Zipper closureDo Not Tumble Dry?Superior Material??90% Cotton, breathable and soft fabric brings your comfort wearing.?Zipper Design??The men slim fit shirt has a zipper design in one side, a design highlight for shirt.?Shirts Style??V-Neck Short Sleeve,Lightweight Pullover,Muscle Sweatshirt with zipper for Men.?Multiple Usage Occasions??Casual, sports, beach, athletic, workout, business, daily wearing for all seasons.?Garment Care??Machine wash/ Hand wash recommended. Please wash separately to avoid discoloration and not bleach.