This is the pair of packing cubes that compress by 50% and help travelers organize their clothing, toiletries, and other essentials. Unlike similar compression bags that require a vacuum to condense their content, these 4" deep cubes have a dual zipper system that instantly reduces volume by half. They also have an interior polyester lining and a 420-denier polyester shell that withstands water and even the most frequent flying. With a side handle on each cube. Between trips, the smaller cube nests inside the large one for compact storage. Gray Heather. Small cube 10" L x 8" W x 4" D (2 1/2 oz.), Large cube 13 1/2" L x 9 1/2" W x 4" D. (3 oz.)