... inflexibility, not chapped or broken off for inflexion (insole paper board, cellulose board) 1) Applications: A) Shoes industry: Fit for leather shoes ... for manufacturing shoes and cases 6) Comfortable: Made of plant fiber, with good ventilation, elastic, environment friendly7) Sizes: 36" x 60 ... .5kN/cm213) Flexure index: ≥1.914) Moisture: ≤10%(insole paper board, cellulose board) insole paper ...