The IMSS that I received is in excellent condition, as advertised, and it was shipped immediately, and took only a few days to receive through the USPS. The zippers don't snag constantly, which is better than several other sleeping bags I have. I used the Intermediate bag alone at 28 degrees F, on a sleeping pad with high R value, in a tent on snow, and it worked well. I used the bags snapped together at 24 degrees, same configuration, and they were very comfortable. Both times without the bivy cover. According to the Tennier Industries information sheet on their retail version of this sleep system, they rate the combined bags as comfortable at 14 degrees F, a temperature limit of 0 degrees F, and extreme use limit of -40 degrees F. This sleep system is very versatile, and a good value for the money.
Reviewed by: Charles Preston from Northern Idaho on 1/3/2023