WeatherTech Under Seat Storage System is a custom-fit pickup truck storage bin that fits underneath your rear seat to keep all of your essentials organized. The Under Seat Storage System is the easiest to install, custom-fit solution for storing and organizing your cargo in your 2018 Toyota Tundra. Protect your investment against stained and torn carpet by perfectly lining the rear truck floor. The liner’s "soft touch" material and built in dividers help to prevent cargo from shifting, and provides easy loading and unloading of your essentials.