Once again, CASH CA and immun team up together for a collection of backpacks for the Spring 2013 season. The Lightweight Backpack is based on the staple backpack silhouette from immun, updated by few improvements for better usability. Firstly, the exterior shell is constructed from lightweight ripstop, 50 denier polyester taffeta material, reducing burden on the users. Secondly, a carry handle was implemented on each side, under the side pockets, making it easier to lift the bag up or set down. A choice of three neutral colors is available at Heather Grey Wall in Tokyo, and all CASH CA dealers in Japan.