Description Alpha Construction: Built with hand-laid premium, natural rubber over insulating neoprene for durability, flexibility and complete waterproof protection. Active Fit: With a comfortable, secure fit to keep your foot in place while on the move, boots with Active Fit also go on and come off with ease. Alpha Lite Diamond Outsole: The Alpha LIte Diamond outsole features fully vulcanized construction for extra durability and a rugged lug pattern for better traction.