The Pelican 1090CC Hardback case with Computer Case Liner is unbreakable, watertight, dustproof, chemical resistant and corrosion proof. It's kind of like a bullet proof laptop sleeve and is ideal for laptops that you need to protect when a big, bulky case is not desired. It's made of Ultra High Impact structural copolymer that makes it extremely strong and durable. Its exclusive 1/4 (6.4 mm) neoprene o-ring and ABS latches seal perfectly and includes an automatic purge valve for quick equalization after changes in atmospheric pressure. Your equipment can fit into the high density foam of the case for total subjection and protection against impact, vibration or shock. This case is NATO codified and tested to IP-67 (Ingress Protection).