Muck boot arctic adventure boots the muck boot arctic adventure boots are all purpose winter boots with a difference designed to keep your feet warm and cosy in temperatures as low as 30c these cosy fleece lined wellies have neoprene stretch fit cuffs which keep warm air in and cold air out as well as allowing for a snug fit 100 waterproof lightweight and flexible with 2mm thermal foam insoles for additional warmth plus eva moulded mid sole cushions and moulded outsoles for improved