... stiffness, bending degree, toughness, bonding strength, the tension between layers waterproof performance. l Specifications1. Thickness: 1.0mm-3.0mm2. Size: 54 ... bending degree, toughness, bonding strength, and the tension between layers waterproof performance, product quality is good, long-term stable quality.2 ... P.C.:362200Contact Person:Ms Lisa High quality cellulose insole board for shoes materials