Nylon Cart Covers protect your Wire shelves, solid shelves & shelving units against pilferage, airborne dust, water and other contaminants. Cart covers with velcro or zipper flap are available in Blue, Forest Green, Navy Blue, Red, Yellow or White 400 Denier Fabric. Specify zipper or velcro for closure. **Note: Cart covers are custom made to order and can take up to 10-14 business days to ship.