The Dr. Martens® Corvid SD Non-Metallic Composite Toe 7-Eye Boot has a lightweight construction that still provides superior protection and comfort all workday long. Durable leather upper. Part of DM's Lite Range Collection. Style numbers: R21101001 and R21823207. Non-metallic work boot with a composite safety toe. Composite toe meets ASTM F2413-11 MI/75 C/75 SD (static dissipative) standards. Padded collar and tongue for added comfort. Mesh lining for breathable comfort. Traditional lacing with heavy duty metal eyelets for a secure fit. Removable smart foam antimicrobial footbed offers extra comfort and a fresher foot environment. Lightweight compression-molded EVA midsole. Cement construction offers a more lightweight feel and better flexibility. Non-marking, heat-resistant rubber compound outsole with superior slip resistance. Imported. Measurements: Weight: 1 lb 10 oz Shaft: 5 1⁄2 in Product measurements were taken using size UK 10 (US Men's 11), width Medium. Please note that measurements may vary by size. Sizes: UK 7 (US Men's 8, US Women's 9), UK 9 (US Men's 10, US Women's 11), UK 10 (US Men's 11), UK 11 (US Men's 12), UK 12 (US Men's 13), UK 13 (US Men's 14)