YETI backpack cooler in blue and gray. Durable and stylish design. M20. Used 1x, I just don't reach for it. Great, like-new condition from a smoke and pet free home. See pics for additional information from the Yeti site online. Please ask questions prior to purchase. Bag is large and measures approx 18" H x 18" W (14" on bottom). Weight is 5 lbs empty. Leakproof lining. They don't make this design anymore.