O'Neill Mens 2 mm Hammer Long Sleeve Spring Wetsuit O'Neill Hammer 2/1mm Long Sleeve Springsuit. Men's springsuit wetsuit. 2/1mm neoprene thickness. Long sleeve design with back zipper entry. Constructed from O'Neill's signature Ultra Flex&#8482; neoprene for ultimate mobility. Seamless shoulders and underarms for comfortable paddling. Lumbar flex panel at lower back. Double superseal neck for added insulation. Sturdy flatlock seams. 92% Nylon/Polyamide, 8% Elastane. Imported. Vendor style #: 4292. Size &amp; Fit Guide Model is wearing a Size: Medium Model's height: 6'0" Shirt: 15.5 inches Waist: 31 inches