The Alpha Aggressive 16" Steel Toe Work Boots from Lacrosse feature an extremely durable Vibram outsole for superior traction for any outdoor conditions. Long-wearing, comfortable, lightweight and 100% waterproof, these boots are made with Alpha construction, which consists of ozone-resistant rubber over 3.5mm naturally-insulating neoprene to keep feet dry and comfortable. Back gusset and strap on the 16” shaft supplies a customized fit and is easily adjustable to accommodate clothing. The Vibram 132 Montagna outsole features lugs that are angled to provide substantial support whether ascending and descending. The center lugs combined with the unique Vibram rubber compound provide maximum traction on wet and dry surfaces. The steel toe meets or exceeds ASTM standard F2413-11 M I/75 C/75 EH and the rubber upper offers chemical resistance against 25 industry chemicals tested to ASTM F903 Procedure A.