The industry's first truly hermetically sealed dry box. Constructed of high-density polyethylene, these containers are built to withstand any abuse imaginable. Designed to be absolutely air-tight, each container is equipped with a relief valve allowing the lid to be opened in the event that a vacuum develops due to changes in atmospheric pressures. Flush-mount hinges, latches and handles, along with 1" radius corners ensure protection for both the product and the user against damage and injury. All hardware is mounted with stainless bolts and can be replaced in the field or at home in the event it is damaged or broken. A self-draining lid provides both dry seating and tie-down grooves for securing the dry box to a raft, canoe, truck, or trailer, without strap movement. Not recommended for standing on or using as a rowing seat. Oversize charges apply.