Engel32 qt. Soft-Sided Cooler The ENGEL HD-30 soft-sided cooler is entirely welded, while most similar bags out there are sewn. By welding all seams, warm air is kept out, dramatically increasing the life of the ice or ice packs inside, ensuring no air or water leaks, and keeping cold forfour and a half days in 90-degreeweather. The HD-30 boasts an outer shell composed of durable 840-denier fibers, which provide maximum strength and abrasion resistance. The front and back side are laminated with a Thermal Plastic Urethane (TPU) film, adding another layer of strength and puncture resistance. With the HD-30, you don't have to worry about water leaks or warm drinks; focus on your adventures. This cooler will take care of the rest.