5mm SPC flooring and a wear layer with a thickness of 0.3mm has the advantages of good stability, high peel strength, low walking noise, no warping, and environmental protection. It is better to use a wear layer with China 5mm SPC flooring.
The backing or bottom may include IXPE/EVA or other soundproofing material. These layers provide underfoot cushioning. The thicker it is, the more comfortable it will be to stand on.