The 1964 Premium T by Sorel® reinvents the classic boot with the protection that you need for the rugged outdoors.Style is best for use in heavy snow. Waterproof full grain leather upper.Seam-sealed waterproof construction gives you the protection from the elements that you need.Removable 9mm recycled felt inner boot for added warmth.2.5mm bonded felt frost plug.Handcrafted, waterproof vulcanized rubber shell gives you added protection from moisture.Features a low-profile herringbone outsole that provides plenty of grip when the going gets slick.Temperature rating: -40° F/ -40° C.