Both on the road and on-site, Polar King freezer trailers and cooler trailers are built to last. Our unique seamless, one-piece, fiberglass construction will not rust, scratch, dent or corrode. Every Polar King refrigerated trailer is built to withstand the worst outdoor elements and rigors of local or highway travel. All Polar King trailers are built from the ground up, allowing you to add custom options of most any type to your new refrigerated trailer. From gas and diesel generators to galvanized frames, we have the capabilities to design the perfect trailer for your application.