I have a 40DEG 3/4 length 800 fill Wilderness Logics underquilt that has been used once by the previous owner. It weighs about 14 ounces according to previous owners scale. Looking for 90$ shipped. Condition is great.  I have never used it. Leaving to hike the AT next week and I’m trying to clear out any extra gear I have around. Comparing this to a WB yeti 20 it seems to be more like a 20 degree underquilt than a 40 degree one. Lot’s of loft!  I will upload photos upon request.