The Sync is designed specifically for use on push carts. Sun Mountain started with a top and bottom built to nest in the upper and lower bag wraps of the carts. Then, they molded the bottom so it fits over the lower bag rest of Speed Cart V1R, Pathfinder PX3 and PX4, limiting side-to-side bag motion. In addition, all pockets are forward-facing and accessible when the bag is on a cart. Finally, there is a cart strap pass-through so the Sync can be strapped to the cart without hindering pocket usage.