PRP Rear Door Bags with Knee Pads for Polaris RZR PRP Door Bags offer additional storage options and knee protection for your Polaris RZR factory doors. Constructed from water-resistant marine-grade vinyl, it features integrated knee pads that shield against impact during bumpy rides or while getting in and out of the vehicle. Features: Protect your knees and add storage to your factory rear doors Perfect for cell phones, water bottles, goggles rags, and more Knee pad protects you from hitting the door in rough terrain Attaches to rear stock RZR door using factory screws Made with durable, water resistant marine-grade vinyl