The Pro Double End Bag is constructed with a specially designed synthetic leather that is tested for both UV and mildew resistance, making it suitable for both indoor and outdoor use. This ball features a strong, double-stitched adjustable elasticated nylon strap for maximum strength and fast movement. Measuring 119cm x 19cm with added 11cm end straps, this ball also comes with a rubber bungee cord for adjustability and calibration. The tough nylon material provides ease of customization and stability, and the ball is designed to mimic the shape and size of a human head for more realistic training.