The OEM Champion Sport VTB Optic Tether Ball is designed for heavy-duty use, ensuring it withstands vigorous play. Its water-resistant rubber cover prevents damage from liquids, making it suitable for outdoor activities. The nylon-wound butyl bladder securely retains air to maintain proper inflation, while the white tether is made of durable nylon to resist damage. This tether ball is ideal for schools, parks, and recreational facilities.