A highly functional expandable trunk bag with a thermal-lined main compartment. Optimized for use as an insulated lunch bag. Oceanweave 600D recycled fishnet polyester with waterproof polyurethane coating. Washable reflective interior is ideal for carry beverages/food. Lightweight, universal Velcro attachment system attaches to top of rack. Insulated main compartment is ideal for beverages/food and helps keep contents cool/warm. Side pockets expand to provide an additional 328 c.i. in the form of fold down panniers. Zippered rear pocket and mini pump strap.