Amazon.com | Sorel Men。SOREL Men\'s Caribou OTM WP Boot in the colorway Buff, Madder Brown. These are men\'s size 11 boots. Product Information Style Name: Caribou™ OTM WP Color: Buff, Madder Brown / Chamois, Marron Garance Material: Features a waterproof nubuck leather upper with a handcrafted waterproof vulcanized rubber shell and a removable 9 mm washable recycled felt inner boot. Features: The boots have seam-sealed waterproof construction and a SOREL AeroTrac™ non-loading outsole designed for traction on snow and ice. Sizing: This boot generally runs a little large due to its roomy liner; it is often recommended to size down by a half or full size for an optimal fit.