Do you want to drain the foam at the bottom of the box? Need cover to cover it?
Then you have to get two breathable big hole or suffocated there can not put the sun
High density, can block the direct exposure of ultraviolet light
It is possible, but from the quality point of view, you as a customer first feedback to the dyeing factory, Gong Fu wins Huang Yi number of copper fan expansion by the dye factory to submit improvement measures report.Also, you have to check whether the gray standards, if not compliance , You can receive the dye factory report as appropriate.
