These protective cases are made of durable, reinforced polypropylene that provides exceptional strength. They are designed to be watertight and dustproof, making them ideal for outdoor enthusiasts. The included pick-and-pull foam insert offers excellent impact-absorbing protection for your belongings. Additionally, the cases feature strong, secure latches that are easy to open, an adjustable pressure release valve to equalize pressure for effortless opening, and pre-drilled holes for two padlocks (locks not included). The interior dimensions measure 12 inches x 9.25 inches x 4 inches, providing ample space for your items.