lightweight,durable,beat and seismic resisting,waterproof moistureprof,dustproof,heat and corrosion resisting. lightweight,durable,beat and seismic resisting,waterproof moistureprof,dustproof,heat and corrosion resisting. Conventient to be carried and suitable to storage firearms,laptop,medicine,maintence tool, photographic equipment,miniature instrument,stationery,etc.