... ok. advantage: eco-friendly, breathable, durable, antibactreial, sweat absorbing.2)PU FOAM(ORTHOLITE): mostly used in insole for medium and top ... 40-120 kg/m3 is available, is suitable for mattress, pillow, insole, case, mat etc.4)MDI FOAM: such as M80 ... , air, liquid, equipment filter etc. 30ppi PU Filter Foam/Reticulate Foam 30ppi PU Filter Foam/Reticulate Foam 30ppi PU Filter Foam/Reticulate Foam