Wal-mart, Kmart and Lowe's sell metal fold-flat four-wheel carts with handle rails. ElderStore also sells a range of similar lightweight and heavy-duty folding metal carts with optional fabric hooded cart liners. Amazon.com sells the Versacart, which folds up in a scissor-like motion into a compact shape.
Wal-Mart, Kmart and Lowe's range of folding carts are steel or chrome cages with foam-covered handles, ranging in capacity from 125 pounds to 250 pounds. Some of the larger carts have reinforced steel plates at the bottom. ElderStore's shopping carts range in size from the MiniMate with a 100 pound capacity to the Big Bruno cart that carries up to 250 pounds. The VersaCart comes with a detachable water-resistant canvas bag with carry handles and cover that fixes inside the frame.