Lowcell H is a carbon dioxide non-crosslinked extruded foamed polypropylene or polyethylene board with closed cell bubble structure.1.3 times of foaming ratio, density 0.6-0.67g/cm3, thickness 2-3mm. It is made by coextrusion in the cavity of the machine die head and has a three-layer structure. The upper and lower surface layers are blue or green solid polypropylene(PP) or Polyethylene(PE), and the surface is pressed with leather lines, which has the effect of anti-skid.. The middle layer is black low expanded foam, It not only has good cushioning and protection during impact, but also has high hardness and compressive performance.