Wetsuit Boots to keep feet warm. FREE DELIVERY. Without Neoprene Wetsuit boots from O'Neill, Billabong, Rip Curl your feet will turn to ice. Our Neoprene Wetsuit boots come in 3mm, 5mm and 7mm thickness. It is important to wear neoprene wetsuit boots in cold waters as this keeps you surfing for longer. Our best selling wetsuit boots are Rip Curl F Bomb Neoprene Wetsuit boots and the Billabong Neo Westsuit boots.