Bare 2mm Velocity Progressive Stretch Shorty, Men's Comfortable contoured 2mm GLIDESKIN collar with Velcro adjustment 2mm PROGRESSIVE STRETCH Neoprene with 2mm BARESKIN chest plate sheds water andadds warmth. GLIDESKIN arm and thigh seals - Heavy-duty back zipper - Loop at base of zipper assists donning Flat-seam construction throughout for stretch and comfort Adjustable GLIDESEAL neck. - LUMBARE-X-TENDER panel in lower back.