... for Insole: 1)high density, hard 2)antibacterial, odor-free 3)wear-resistant,breathable 4)brand ... of its reasonable price but that its special advantages. 2.Hard PolyU Foam for Insole:Physical CharacteristicsDensity(kg/m3)220 — 240Hardness ... bags, sport equipments and kinds of cushions, knapsack belts etc. Hard PolyU Foam for Insole Hard PolyU Foam for Insole