The 2021-2022 Xcel Drylock booties are next best to surfing barefoot: 3mm, 5mm, or 7mm, round toe or split toe, all deluxe. A powerful design includes a 3D foot mold for an ergonomic fit, and Celliant Black TDC smart fabric for extra lightweight warmth. A new Channel Flex exterior enhances mobility while reducing weight. A single-layer, durable rubber sole provides crazy traction and board feel. Drylock ankle seals keep water out, and a strap design creates more comfort, less pressure. All you need to light it up in cold waters.