... ): mainly used in insole for medium and top grade shoes, case also ok. advantage: eco-friendly, breathable, durable, antibactreial, sweat absorbing ... .2)PU FOAM(ORTHOLITE): mostly used in insole for medium and top grade shoes, case, sport equipment etc. Advantage ... kg/m3 is available, is suitable for mattress, pillow, insole, case, mat etc.4)MDI FOAM: such as M80,M100 5 ...