KEEN UTILITY. 1013258. MT VERNON MID. BROWN.Indoors or out feet have a sturdy foundation and reliable protection in the Keen MT Vernon Mid work boot which features a waterproof nubuck upper with a waterproof breathable membrane and hydrophobic hydrophilic lining to maintain a dry interior. Asymmetrical steel safety toes provide roomy protection while a slip-resistant rubber outsole maintains stability.