Kolpak is the cold standard for walk-in refrigeration and freezers. From their fully custom solution to Polar Pak and Pre-Engineered. Polar-Pak coolers and freezers are made with the same rugged, high performance construction that has made Kolpak the leader in walk-in refrigeration. The Polar-Pak modular panels of 4" 100% foamed in place non-CFC urethane foam offer superior insulating capabilities. When you require a full size walk-in with greater flexibility, Kolpak KoldFront Walk-ins is the solution. Made from the same quality panels and components that Kolpak is renowned for, you get all of the quality, flexibility, durability and energy efficiency you have come to expect.