The ZCA Backpack Cart Fenders protect your bag from the elements and everyday wear and tear. They are easy to wipe clean and are made of sturdy high-density polyethylene that is specifically formulated for the outdoor environment. Fenders are UV stabilized with color dyes that will not break down in harsh heat, sunlight or salt water. Simple to install and remove with specified tools. Compatible with ZCA Backpack Cart model only. Sold in PAIRS (left/right)(ZCA Backpack Cart sold separately)