The Highway 21 Spark boots may look simple and basic but don't be fooled, these bad boys are all about performance. Made from 100% high quality full grain leather, the Spark books are highly abrasion resistant. Goodyear welt construction gives you piece of mind that the Spark boots will last through the ages. Full grain leather construction Water resistant Goodyear welt construction Anti-slip oil resistant soles HiPora waterproof lining Able to be re-soled Calf height 2 Year warranty