This is a sub-mat for climbing from Metolius. Please note that this is a sub-mat, so it is not as large as a main crash pad. It's sized to fit inside a main crash pad, making it easy to carry! The backing is made of a material that resists dirt. It has been used a few times on the rocks, so there is some dirt, but I think it is still usable without any problems. Length: 58cm, Width: 90cm, Thickness: 5.5cm! Bouldering Climbing