This Pannon Products tonneau cover is a multi-layered, shrink-resistant vinyl covering to protect the bed of your truck when it’s empty or lightly loaded. But when you need to carry something bulky you can easily unsnap the cover and roll it up. The snap rails for this Tonneau cover clamp onto your truck – no holes need to be drilled. Tonneau covers don’t just dress up your truck and add privacy, they save fuel – up to 10 -15 percent – by improving the aerodynamics of the pickup box.