The Stomp Factor 2 full grain leather boots are made with high level technology. With a molded unit sole, smooth contour leather tongue, anti-abrasion toe and heel caps and a quick-dry nylon lining. The boots are mounted to Neutron 6000 Aircraft Aluminum plates for supreme durability. With Militia 59mm x 38mm, 98A wheels with BEVO Gold-9 Race Rated (chrome) Bearings. If you're looking for a top level derby skate, this is one of your best choices, and the affordability cannot be beat!