All Terrain Wheels with skid bars and reinforced frame. Reinforced Retractable Handle Cart System. Large Ventilated Skate Pockets. Heavy duty 600 Denier polyester and Doby nylon construction. Spacious side accessory pocket. Ventilation grommets facilitate air circulation. Velcro id holder for easy bag identification. Adjustable/Removable non-slip padded strap. Heavy duty zippers.