Patent attributes
A mat and a method for manufacturing the same are provided. The mat includes a first foam layer, a second foam layer and a third foam layer. The first foam layer has a first hardness and a first porosity. The second foam layer is connected with the first foam layer and has a second hardness and a second porosity larger than the first porosity. The third foam layer is connected with the second foam layer and has a third hardness and a third porosity smaller than the first porosity. The second foam layer includes a first connecting surface facing the first foam layer and a second connecting surface facing the third foam layer. The contact area between the first connecting surface and the first foam layer is different from the contact area between the second connecting surface and the third foam layer.
