These boots tend to run small. When ordering, please select a half size larger than your normal street size. Four-wheel-drive performance for your feet. Waterproof leather, webbing, and mesh upper. Upper is made of environmentally preferred premium leather from an LWG-certified tannery. Mid-cut height increases ankle support. KEEN.DRY waterproof/breathable textile membrane keeps your feet dry and comfortable. S3 Heel Support Structure. Secure-Fit lace capture system. Removable metatomical footbed. ESS shank provides torsional stability for a secure ride. Dual density compression molded EVA midsole. Non-marking carbon rubber outsole with 4mm multi-directional lugs. Measurements: Weight: 1 lb 4 oz Circumference: 12 1 2 in Shaft: 4 1 2 in Product measurements were taken using size 11, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.