If your hauling oily car parts, or if you need a place to put muddy boots, pets, or anything that could cause a mess, then you need the Rugged Ridge All Terrain Cargo Liner. 
These have been fabricated out of high-grade thermoplastic, and fits perfectly around the contours of the rear cargo area.

A versatile Jeep deserves versatile accessories. Keeping you on-the-go with ease, the rear Configurable Cargo Cover (C3) offers complete protection for the rear cargo area of your Jeep Wrangler JL, keeping your interior pristine throughout your daily use by protecting your carpet and plastic trim from damage, scratches, pet claws, dirt, and other debris.