Rock Pad is used to protect pond and water feature liner from sharp rock edges during and after installation. The extra-thick, non-woven polypropylene fabric provides a significant cushion between the liner and large rocks, effectively protecting the liner from rips or tears. This Rock Pad Roll measures a little over 3 ft wide by almost 100 ft long (1 M x 30 M). It fits great into the back of any standard size pickup or van and is easy to transport as well as install.