ENGEL HEAVY DUTY SOFT SIDED COOLER BAG - 20 LThe Engel Heavy Duty Soft Sided Cooler (HD20) takes performance to the next level with its fully welded construction, setting it apart from the competition. Unlike sewn coolers, every seam is welded to create an airtight and watertight seal, locking out warm air and keeping ice solid for longer. Independent testing shows the HD30 can keep contents cold for up to 4. 5 days, even in 90F temperatures. Built tough, the HD30 features an 840 denier outer