Built by playboaters, the Rodeo Sock provides comfort and warmth in an ultra thin design. 1.5-mm vulcanized rubber sole for comfort and reduced wear in all conditions. 3-mm DuPont neoprene keeps feet warm and nice. ToughTex&$153; upper panel has been expanded to cover the entire foot for better durability and Safe guardion. Titanium and microfleece lining for Additional warmth.