The vulcanized DC Tonik shoe is a tested style with its heavy-duty suede and canvas mix upper and its ventilation holes to assist prevent feet from overheating. Upper: Leather/ Lining: Fabric/ Outsole: Rubber. Vulcanized building offers much better board feel, sidewall grip and more flex. Outsole uses a sticky rubber offering great grip that’s likewise resistant to abrasion. Low-top Shoes. DC’s trademarked Tablet Pattern tread. Material: Leather, Canvas.