ROLA 59102 Wallaroo Cargo Bag, Rainproof, Expandable Hitch Tray Carrier Multiple zippers allow bag to expand from 9.5 to 11.5 cu ft EXPANDABLE STORAGE: Free up space in your vehicle with a hitch tray cargo bag that expands from 9.5 cu. ft of storage to 11.5 cu. feet when extra zipper is unzipped. RAINPROOF MATERIAL: Made from a premium-quality, rainproof material with sonically welded seams, this bag keeps cargo dry, clean, and protected. UNIVERSAL FIT: The 6 straps on this carrier provide safe and secure attachment to the hitch mount cargo tray and baskets. COLLAPSIBLE DESIGN: The soft sides of the ROLA Wallaroo Cargo bag fold for easy, convenient storage when not in use. Constructed from premium quality rainproof material with sonically sealed seams Premium quality rainproof construction provides protection 2 interior pockets hold small items and help organization 6 straps provide secure attachment Un-Expanded Dimensions : 9.2" L x 11.6" W x 5.7" H, Expanded Dimensions: 48 L X 19 W X 22 H