Designed to fit into bag one of the Trolley Bags Original size set. The bags roll up neatly with a velcro handle to take into the supermarket. The stay cool bag folds in thirds and secures with velcro straps. This insulated bag will keep all your cold items cold longer. The cool bag can be zipped up and removed from the trolley with bag 1 handles. After use, the Trolley Bag Original cool bag can be easily folded back up, ready for your next shopping trip. Keeps your cold food cold on the way home Folds for easy storage Eco-friendly, you don't waste plastic bags Keep your frozen items frozen until you get home Hefty room for lots of product