I have never used my ridgerunner in less than high 30 degree weather, looking to do a BWCA trip for late September early October. I have a Ridgecreek 3 season, a spindrift and i also own a static v luxe insulated pad as well, which combo would be the best, i'd rather not bring the pad, but since it's a canoe trip the weight isn't a big deal. I should add that my Top quilts are both Down, 20 degree and 40 degree with 1oz overstuff, i think the choice here is obvious with the 20 degree.