Expandable Hitch Tray Rainproof Soft Sided Cargo Bag with 2 Extra Tie Down Straps (Black) Rainproof expandable hitch tray cargo bag. 47"W X 18.5"D X 15.5" to 21.5"H Adds up to 11 cubic feet of storage space for road trips Durable construction protects against rain, wind and sun 6 straps provide secure attachment; 2 interior pockets keep you organized Included: Two tie-down straps for your camping and travel needs