There are also other varieties that are used specifically for higher and commercial areas
. One is 8mm and another is10mm underlay .The former is made up of green and silver paper while the latter is made up of orange and silver paper. If you are doing the purchasing yourself you will need to know the dimensions of the area to be carpeted. Measure the length and width and times that by 2 to get the square meters. That will be how much underlay you need to order. They are designed specially for commercial use and for high traffic areas desire extra softness and high durability.