All these reusable shopping bags are made of polyester fabric which is lightweight yet sturdy and all seams are reinforced with bias tape which makes our reusable bags strong enough to pack heavy groceries, like canned goods, gallons of milk. Long straps allow you to go on your shoulder, which makes carrying them into the house from the car much easier. Our reusable grocery bags can be easily wrapped into a small roll which takes up hardly any space that can easily fit in a backpack, purse, pocket or the glove box of the car. If you don’t like folding, a great choice for you, just fit back them into the separate zippered carry pouch, then you will always have reusable bags with you whether you stop by a store on whim or have an unplanned shopping trip.