Very grippy material.  Absolutely stops items from sliding.  I just updated the camper for the fourth time and this is already on order just like the first camper that proved this pads the shelf if items fall over, and it stops items from sliding around periode. Nothing else I tried could stop the sliding.  I totally recommend this for Rv shelf liner.  By the way I tried the stuff to keep area rugs from sliding around, it did not have enough of the rubbery grippy stuff to work like this.