5mm thick material 5mm SBR material not only provides sufficient warmth, but also effectively prevents cold wind from entering the hubcaps. Exquisite stitching Exquisite stitching effectively avoids the problem of overshoe tearing while riding. Large opening The opening at the bottom is large enough to expose the cleat, making it perfect for MTB road cycling shoes. Durable Made from high quality Kelvar and SBR fabrics, the toe cap is reinforced to prevent wear and tear when walking around.