Interior and exterior DryHide fabric shell is high tenacity 840 denier nylon with a double TPU (thermoplastic polyurethane) coating. It has RF-welded seams to provide superior leakproof durability, is waterproof, and resistant to puncture, abrasion, and UV rays. ColdCell insulation (closed-cell rubber foam) is 1 In. thick on the sides and 1.5 In. on the bottom. Anti-microbial liner resists mildew and is FDA food grade. Hydrolok waterproof zipper has an airtight closure and is constructed like zippers found in survival suits and HazMat gear. Includes 6 reinforced D-ring tie-down points and HitchPoint grid. 3 carry options: detachable and adjustable shoulder strap, primary carry handles, and end handles. 3 year warranty.