Techniice Signature Series Ice Chest, 45 L This 45L model has 2.8"walls & 3" lid that is more than twice as thick as most polyethylene coolers The lid and walls are injected under extreme pressure with high density multi compound PU insulation This box incorporates a fully molded and integrated hinge system designed to last for a life time Dual air lock seal system comprises one EVAS seal plus a fridge gasket seal This system provides a perfect seal at virtually all ambient temperatures