The basic hood and easily accessible drawcord allow for one-handed operation, but without a draft collar, cold air seeps in.
There’s plenty of shoulder room in this bag with 62 and 58 inches at the shoulder and hips, respectively. The footbox is warm but tight (40 inches).
Kelty takes a layered approach: The Dualist is like a synthetic bag (proprietary ThermaPro) within a 550-fill DriDown (duck) sack. The layered construction allows you to roll around with your bag and always have synthetic fill below you; it compresses less than down so you never sacrifice warmth.
We were so warm on a 30°F night in Targhee National Forest that we had to open the zipper. But in the low 20s, we needed insulated jackets to keep warm.
The nylon shell is durable but lacks the Marmot’s water resistance. In 30°F temps on the North Teton Trail, it soaked up condensation from the tent walls, which led to cold spots in the footbox.