Great liner that provides plenty of room! I used this over the weekend (came just in time) and we were experiencing some unusual heat in this region. It was far too warm for my sleeping bag, so I slept in only the liner. For this purpose it works great! It also pairs up well with the TNH sleeping bag, though I do find that the actual bag runs a little bit tight. The only thing I would change about this liner is putting zippers on both sides to make sure it is compatible with all of the sleeping bags on the market. Other than that, it seems like another excellent product from TNH and I am looking forward to checking it out in conjunction with my sleeping bag for the colder weather that is fast approaching!