Poly-foam
Poly-foam also known as Poliyou, hardness of 10-40 degrees(ASKER.C). Breathable, absorb moisture, odor, mildew, bacteria, buffer was good. Can be added wood chips, activated carbon, antimicrobial agents, spices and anti-static function. Today, lots of first-line brand use this material, for it is a good material which health environmental protection, and have a Competitive price