Rip Curl Dawn Patrol 4/3mm Summer Back Zip Mens Wetsuit 2021 The Dawn Patrol is packed with high end features yet at an affordable price. The suit uses E5 Stretch Neoprene throghout with Glue Blind Stitched Seams and internal seam taping, increasing durability.  Features: E5 Neoprene - Premium high stretch, lightweight neoprene with 30% more stretch, 20% lighter, 10% warmer than E4 E5 Flash Lining Front and Back Panels - Two engineered layers that funnel water rapidly out of the suit once it is hung up. Also, one of the warmest and comfortable linings available. E5 Internal Seam Taping - Added to 3/4 of the wetsuit for increased strength and durability E4 Thermal Lining in legs - Combination of E4 neoprene and Thermo Lining - stretch and warm.