Chrome constructed the uppers of the Storm 415 Work Boots from an oiled, full-grain leather. On top of this, the shoes feature the Chrome s Storm waterproof technology — an internal membrane of four-layer breathable, waterproof fabric. And to make sure that absolutely no water get s through, Chrome also gave the Storm a fully-taped seam construction. The uppers were attached to the last and sole using vulcanized construction, which also provides a flexible, yet durable sole. At the footbed, Chrome used a contoured polyurethane that s impact-resistant and features a blown rubber midsole wedge for comfort. The soles are board lasted for pedaling comfort, which is really why Chrome created the 415 Work Boots in the first place.