This two-person, thermal portable fish house allows two anglers to fish comfortably side-by-side. Or for really big guys, the Nanook XL Thermal works as a great one-person house. And with our exclusive Side Symmetry Door System (patent pending), anglers can get in and out of the shelter with ease. The Nanook Thermal XL is the thermal version of one of Clam’s most popular models over the years. This lightweight design cuts through the snow or glides easily across the ice to set you on top of the perfect spot. And a thermal skin retains heat so you burn less propane. Front and rear access doors make access into this shelter easier than ever.