1mm Prologue - Round Toe Wetsuit Boots for MenFeaturesNeoprene: FreeMax super stretch neoprene for great performance & durability24% less CO2 emissions per wetsuitLimestone-derivate eco-friendly neoprene made from scrap rubber tires and Bluesign® certifiedExternal seams: Flatlock stitched seams that are locked but not sealedAqua Alpha, non-toxic, water-based glues