another big +1.
Super Light, and room for tossy / turny big dudes that don't like the constricting mummy bags so much. I've had my 15 degree for 12 years and still holding up well ... (2 weekish hunts every year + the occasional sleep in the car / camp trip). I've been good from 6 degrees F to 40F and adjust with wearing long underwear in the colder temps where i'm in a Tipi and have a good pad with good R rating … if I'm cold I close the head and breath inside.
Anyhow, the big differentiator here is the stretch which gives awesome size/weight ratio and let's you move inside the bag.
The outer material is not the most rugged, but if you take care of your bag, it will take care of you.
