Engel, the original high performance roto-molded cooler was built for toughness and durability. With a full 2 inches of closed cell foam insulation in the lid, on the sides, and on the bottom, helping to retain cold and ice for up to 10 days. Unlike the rubber gaskets used by our competitors, Engel's all silicone gaskets create a near airtight seal that is durable and will never lose it's shape. Many independent studies that rank Engel Coolers as one of the best rotomolded coolers on the market. As the original high-performance rotationally molded cooler, we thought of everything one might need for their adventures. It also boosts numerous features, TruHold Lid: Reinforced non-skid lid for greater traction, stability and strength whether standing or sitting, ArticVault Gasket: Unique freezer style airtight, food-grade silicone gasket keeps lid sealed, Anvil Hinge: Integrated full-length, self-stopping rear hinge for maximum strength, Unity Latch System: Recessed marine-grade, adjustable draw latches with stainless steel hardware that double as a bottle opener, Cornerstone Feet: Non-skid, non-marking feet keep cooler in place while keeping your deck clean, I-BEAM Lid Inserts: Durable I-BEAM inserts allow for maximum weight-bearing strength and prevent lid warping, DuoLock Security Holes: Dual padlock holes allow you to lock the cooler shut for bear resistance, Quadra-grip Tie-Down Points: Fits webbing, turn buckle, and other traditional tie-down systems as well as standard crimped security cable to prevent theft, Flick Drain Plug: Recessed one-twist opening drain plug with lanyard hole.