This Saratoga Bag is the perfect accessory to the Postal Mail Cart. Two bags will easily fit on one cart. The top flap of the bag fits loosely and covers 6-1/2" of the front of the bag to keep mail dry. This bag is constructed from durable 18 ounce 100% cotton canvas while is both water and mildew treated. Saratoga Bags feature a 1-1/4" heavy-duty welded steel wire D-rings and two adjustable back pack buckles for closing.