Belleville Hot Weather Desert Flight & Combat Vehicle (Tanker) Boot , Men, Shoes Leather Vibram sole Shaft measures approximately Mid-Calf" from arch Outsole Rubber, VIBRAM Sierra Polyurethane Removable Insert Very Breathable, Well Suited For Hot Environments X-Static Silver Coated Lining That Contains Anti-Microbial and Odor Reducing Properties Durable Leather Which Resists Water Absorption