True to size, Slim fit. If you are in-between sizes or want to wear a thick sock, it is recommended to size up. The FSC -certified Commando Chelsea Boot was crafted using natural rubber from forests independently audited to Forest Stewardship Council standards. These 100% waterproof boots are handcrafted to strict standards to protect forests, as well as the animals and communities that depend on them. Crafted from natural FSC -certified, the 100% waterproof Commando Chelsea Boot is an icon within our Original collection. Retaining all the beloved features of the Original black Chelsea Boot, like the flexible gusset and Hunter grip, this new silhouette has a higher profile, reaching 15mm further up the leg. This style also features an updated recycled polyester lining and insole.