40% heavier bolt-through-body has comfort grip side handles with gasketed heavy-duty back-up plates. UV Inhibitors guard against sun damage. Ultratherm insulation in body and lid for maximum cold retention. Specially anchored heavy-duty stainless steel hinges and stainless steel latch. Dual stainless steel lid straps. Cool Riser Technology elevated design improves cooling performance. Convenient fish measuring ruler on lid. Threaded drain plug.