The YETI Tundra 45 combines versatility with durability. This premium cooler is infused with that legendary YETI toughness a durable rotomolded construction and up to two inches of PermaFrostG insulation. Which is to say it''s built to last and will keep your contents ice cold even in sweltering conditions, like a triple-digit summer day in central Texas. No bowing, cracking or melting here.