The Aero Boot offers maximum grip and comfort when out on the water. Easy to slip on, with a YKK zip closure and wide adjustable ankle strap for additional ankle support. Constructed with 5mm Neoprene for thermal protection and blind stitched seams for maximum comfort and warmth. The wrap-around, non-marking medium rubber sole means increased flex and feel, while the reinforced heel, toe, and bridge support allows the flexibility needed to remain agile. Ideal for all conditions, the Aero Boots are suitable for dinghy sailing, and paddle and board sports such as stand-up paddleboarding and surfing. It depends on each individual, but Gill recommends wearing the Aero Boot in Winter temperatures between 48-59 degrees Fahrenheit.