What isolates the ENGEL delicate sided cooler from the challenge is the way that the ENGEL HD-30 is altogether welded while the vast majority of its partners are sewn. By welding all creases, warm air is kept out, significantly expanding the life of the ice or ice packs inside. The welded creases guarantee there will be no air or water spills, and permits the delicate sided HD-30 to keep refreshments cold for as long as 4 days in 90° temperatures, as per an autonomous audit. The HD-30 brags an external shell formed solid 840 denier strands that give most extreme quality and scraped area opposition. The front and rear are overlaid with a Thermal Plastic Urethane (TPU) film including another layer of solidarity and cut obstruction.