... better than POLY YOU foam3)MEMORY FOAM:density from 40-120 kg/m3 is available, is suitable ... T30,T40,T50,T70,T80 etc, generally sale to shoe factory, insole factory and gluing factory.6) ... boot insole etc.7) FURNITURE FOAM: density from 5kg/m3 to 80kg/m38)FILTER SPONGE(reticulate foam ): is ... foams. 2.40ppi Air Filter Foam detail:1)Material: PU (polyurethane)2)Aperture: from 10ppi to 60ppi is available3) ...