Ideal for cold surfing conditions, the O'Neill Men's Mutant 43 Wetsuit uses Firewall insulation in the chest and back panels to lend extra heat and to wick away moisture for improved comfort. Equipped with 43 millimeter UltraFlex DS neoprene fabric throughout, the Mutant offers plenty of stretch, flexibility, and unrestricted movement while you surf. Its Lumbar seamless design LSD consists of a large panel in the rear area of the wetsuit to minimize water entry and maximize stretch and overall comfort when you spend a significant amount of time sitting up on your board to view the oncoming sets. Seamless paddle zones ergonomic undersleeve panels allow for unrestricted motion and eliminate rashing issues while a minimal seam design provides maximum flexibility in cold surfing conditions. Thanks to its 1x fluid seam weld construction, the Mutant offers superb flexibility, lighter weight construction, and prevents minimal water entry while its plasma wrist and ankle seals prevent over expansion and seal out water. The modular chest closure offers a watertight, comfortable seal, an easy in and out, and eliminates annoying flushing issues. Krypto knee pads with ergonomic shaping offer durability and help protect your knees when you duck dive. The external key pocket houses your car or beach house key.