The Vanguard Supreme is a strong hard case, O-ring sealed and waterproof (up to a depth of 16.5 feet/5 meters), airtight, but with an automatic pressure equalization valve for airline travel. They are able to support up to 265 lbs of exterior weight. The outside dimensions are18.25×14.375×7.625 inches. Inside is a Vanguard 40 divider bag capable of holding up to a dozen small to medium size lenses OR an SLR camera, 70-200 f2.8 lens, and a couple of other lenses and flashes. The internal soft case is completely removable so you can transport in the hard case and then use the soft case on site.