Rip Curl Mens Dawn Patrol 2mm Back Zip Spring Suit is built with E5 Ultralite Neoprene and E-Stitch Seams, offering extreme flexibility for higher performance surfing. This spring suit offers warmth, performance, and durability at a great price. Rip Curl Mens Dawn Patrol 2mm Back Zip Spring Suit Features: Thickness: 2mm Back Zip - Easy entry system with adjustable collars. Learn more about Wetsuit Entry Systems on our blog. Water-resistant steel head zipper with engineered offset teeth and urethane coating E5 Neoprene - Our premium high stretch, lightweight neoprene with 30% more stretch, 20% lighter and 10% warmer than E4. E-Stitched high stretch and lightweight seams. Learn more on our blog.