"The 1510 Protector Carry-On Case from Pelican is made from ultrahigh-impact structural copolymer for strength and durability. Virtually unbreakable, it has a neoprene O-ring to make it airtight. Resistant to water, dust, chemicals, and corrosion, it keeps your sensitive equipment protected from the elements. The automatic pressure release valve ensures the case remains easy to open, even after air travel. The hinged lid has double ABS latches that accept user-supplied padlocks for added security."