The Grizzly Drifter 24 backpack cooler is as durable as you'd expect from Grizzly with a ton of features packed in to keep you going. We start with a surprising 24-quart capacity and include welded seams to keep out the elements. The TRU Zip zipper and high-quality lining ensure good insulation, and the large center storage and integrated drinkware pockets make sure you can take everything you need with you.