The vulcanized DC Tonik shoe is a proven style with its heavy-duty suede and canvas mix upper and its ventilation holes to help prevent feet from overheating. Upper: Leather, Lining: Textile, Outsole: Rubber. Vulcanized construction offers better board feel, sidewall grip and more flex. Outsole uses a sticky rubber providing great grip that's also resistant to abrasion. Low-top Shoes. DC's trademarked Pill Pattern tread. Material: Leather, Canvas.