The FX400 is designed for practice use. Its rubber cover is hand sewn and features premium laces meaning this ball does not feel like a rubber ball. Designed for practice use Deluxe Sewn Rubber Cover Its rubber cover is hand sewn and features premium laces meaning this ball does not feel like a rubber ball Synthetic Leather Laces Nylon-Wound Bladder Baden-engineered shape with "Spiral Zone" radius Proprietary waterproof reinforced liner Rigid Seams with "Trigger" edge for higher-RPM spirals Excellent wet weather ball Size: Official American football Size