I bought the nanook thermal last year. And love it. It stood up to the brutal winter we had last season. I would consider it a roomy one-man, but two people fit just fine. I heat mine with a small Mr. buddy. Warms up instantly with that thermal fabric. The only Negative I would say about it is it needs some sort of wind skirt on the sled like the Otter’s or bigger Clams to keep the fabric tighter to the sled and prevent the wind from blowing in the back.