Bladder with Good Air Tightness --- Use natural rubber and butyl, be strictly processed, has superior

                                                               rebound and air retention.

Enhancement Layers --- Use high quality polyester cotton fabric, have good strength and toughness,

                                           provide excellent resistance to impact.

Air Vent --- Unique structure and assembling method, superior air retention, waterproof.

Leather --- Provide better ability of rebound, water-proof, mould proof, wear-resistance. Use special

                   professional leather to satisfy different fields.