1. Fabric: high quality breathable mesh covering, good wear resistance and strong air permeability;<br>Sponge: Sino Japanese joint venture "Toyo Jiajia" shaped rebound sponge, density ≥ 45, compression permanent deformation rate less than 1.3% (international standard less than 10%), not easy to deform;<br>Cushion splint: adopt multi-layer curved boards of more than 12mm, and press and form at one time;<br>Tripod: metal elbow foot is adopted
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