100% LIQUID RUBBER SEALED EXTERIORJust to make sure they don't miss a spot O'Neill dipped their whole Gooru bootie in a water and wind repelling layer of rubber making them water tight and allowing you to wear thinner boots than you would do normally and still stay warm.Many people don't like to wear thick boots it means you can't feel the board as well and they can be a pain to get off and on especially in the cold weather so if you want warm boots but don't want the extra thickness go for something like the Gooru from O'Neill. TECHNOBUTTER 2 NEOPRENEAdvanced super stretch neoprene. 20% Lighter 30% less water absorption with quick dry properties. 3mm boots are popular with surfers in the milder parts of the UK and these will be warmer than a traditional pair of 3mm winter wetsuit boots. 100% TechnoButter 2 neoprene100% liquid rubber sealed exteriorAnatomical fitDry and warmThe Gooru Tech Boot also :: Men > Wetsuits Size: UK 09,UK 10,UK 11.