1,Full length zipper design, three traditional back pockets for storage. 2,The pro weight polyester fabric is lightweight, durable and supportive. Size suggestion: Small: Height:5'3"-5'6" Weight: 110-135lbs Chest:37"-39"; Medium: Height:5'7"-5'10" Weight: 135-160 lbs Chest:39"-41.5"; Large: Height:5'9"-6'1" Weight:160-180lbs Chest:41"-43"; X-Large: Height:6'-6'2" Weight:175-190lbs Chest:43"-45"; XX-Large: Height:6'2"-6'3" Weight:185-198 lbs Chest:45"-47";