Get more use out of your summer wetsuit, or simply layer up for some added warmth with our Neoprene Long Sleeve Under Wetsuit Base Layer. Comfort, warmth and flexibility were key when designing our long sleeve base layer, this comes from the 1.5mm Yamamoto Smoothskin neoprene, low cut hem and high neck design. We have also addressed the biggest problem of close fitting neoprene base layers, taking them off! Featuring a YKK zip at the back means you don’t have to save some energy for after the swim. Key Features: YKK Zip. 5mm Yamamoto Smoothskin neoprene. Low hem, high neck design. Flatlock stitched. Key Benefits: Increased warmth and insulation. Easy to remove when wet, unlike non zipped versions. No riding up or slipping.