The Pelican 1120 Dry Box is the best waterproof, dust proof, and airtight case on the market! Pluck-n-fit foam allows you to customize your box for all your equipment. ABS structural plastic case is virtually crushproof while the built-in O-ring sealed pressure purge valve allows for quick equalization after changes in altitude or temperature. The lid O-ring and pluck-n-fit foam are replaceable. Cases guaranteed for life against breakage due to manufacture defects.