Thickness: 2.5mm on the body for core warmth and 2mm on sleeves for better movement. Flat Seams: Designed for a close, comfortable fit to prevent chafing. Easy Access: Features an easy-glide back zip with an extended puller so you can zip it up yourself. Security: Includes an internal key pocket. Sun Protection: Fabric provides UV protection. This suit is a size M/L and has never been worn. Great quality neoprene that dries quickly and stays lightweight.