Crossrock CRA901DG Dreadnought Acoustic Guitar Injection Molded Shaped Hard-Shell Case, Grey Ultra high-strength injected polypropylene co-polymer resin with waterproofing Polystyrene foam core with plush interior provides excellent neck support and protection on all sides Resistant to corrosion and impact damage Accessory compartment Reinforced locking loops with one code lock and an extra security trigger release knob