Yeti Tundra 35 - Color: Or Includes- Dry Goods Basket Features & details FatWall Design - Extra-thick walls hold up to two inches of insulation for unmatched ice retention. PermaFrost Insulation - Pressure-injected commercial-grade polyurethane foam in the walls and lid makes sure your ice stays ice. Rotomoulded Construction - Makes it armoured to the core and virtually indestructible. ColdLock Gasket - A freezer-quality gasket circles the length of the lid to block out the heat and lock in the cold. T-Rex Lid Latches - Heavy-duty rubber latches are made with patented technology so you'll never see another busted latch.