Rip Curl Wetsuits - Rip Curl E Bomb 2mm Zipperless Shorty Wetsuit - Charcoal :: Men > Wetsuits. Pocket: External key pocketMaterial: 100% NeopreneMen's wetsuitThickness: 2mmFastening: Zip-free entry for a lighter designE4 Neoprene:20% lighter than E3. warmer and more flexibleE4+ Action Panels: Smooth panels for total freedom of movement when surfingGlide Skin Collar: Comfortable against skin while preventing water entry Size: Small.