The Arctic Sport II Ankle is crafted from Muck Boot'ss traditional hand laid rubber. To reduce weight and increase flexibility,they haveutilisedtheirMuckskin technology. This technology features a printed rubber coating over neoprene that is 100% waterproof. It features cool weather lining for warmth and comfort, along with a lightweight midsole for added support. The boot is finished with a rugged rubber outsole for enhanced traction underfoot.