Leather: high class PVC/PU/TPU/CTPU, available in different materials
Bladder: butyl or natural rubber, nylon or polyester wound
Layers: 4 layers 
Impact test: 6000 times
Roundness error: ≤3.0mm
Environmental-friendly and 6P-free
Excellent elasticity, abrasion resistance, water-resistant
Used for promotions, school training, playing and match