Keep your fuel source properly stored so it is protected from moisture and ready to use. The Weber fuel storage bag is made of polyester with a PVB coating making it weather resistant to keep your fuel dry. This bag holds up to 20 pounds of wood pellets or charcoal. The front window allows you to label when using multiple bags. There is a top handle with a clip for closing and there is a second unique handle on the bottom of the bag for easy pouring. The bag folds flat when not in use. Bag dimensions are (in inches): 11.8 W x 18.8 H.