an open - air vehicle includes a rear cargo area having a floor , a pair of opposing side walls , and a weather - resistant quarter panel of molded polymeric material removably secured to each of the side walls . each quarter panel can be disengaged from a respective side wall by hand by a person , without requiring tools . the aesthetic appearance of each of the quarter panels can match the aesthetic appearance of the floor and / or one or more trim components within a passenger compartment of the open - air vehicle . removable quarter panels may also include various amenities found within the passenger compartment of vehicles such as cup holders , armrests , and receptacles for storing articles .