Backpack coolers are essential warm-weather gear for anyone keen on day-tripping or camping. Whether you need a large-capacity sack for a family of four or want a stylish option for a picnic, here are our recommendations for the best backpack coolers for a range of activities. Backpack coolers use lightweight insulation instead of the layers of foam you find on hard coolers. While the main goal of backpack coolers is keeping things cold, still consider the features you’d look for when shopping for an everyday backpack. How We SelectedAlong with combing through countless user reviews for backpack coolers, we dug into our own testing results on soft coolers.