Polyester Cooler Bag. This is a unique way to keep drinks and lunches fresh and cool. Can be carried 3 ways: with the hand strap with the detachable shoulder strap or with the same strap as a standard backpack. The top unzips to hold sandwiches cookies candy or ice packs. The bottom holds several cold drinks. There is an extra x 7 1/2" x 7 1/2" x 2 1/2" pocket on the outside for additional stuff. Body measures 13" x 8 1/4" x 6 1/2". 3 lbs each.