This is 2 layers of carpet on the front and 2 on the back.Arrows penetrate through so i am thinking of adding another layer. It may like you all say, rot out over time, but it makes a big target that I can close my eyes and shoot into while concentrating on my form and the arrows are easy to remove.

This is a picture of 2 of the three backstops I have. 2 are belting and one is carpet.