Billabong Wetsuits - Billabong Foil Split Toe Wetsuit Boots - 3mm :: Men > Wetsuits. Crafted from 100% SuperStretch Neoprene for comfort and flexibilityIdeal for surfing in cold water above 10à‚°CPull on heel strap for easy accessOptimum flex and grip with rubber outsoleWelded seams to avoid cold water from enteringExternal split toe bootie3mm thickness Size: UK 4.