Honestly, my feet were pretty much protected by my under quilt. I am 5 ft 10.. The under quilt is a premium incubator.. size small..Up to 5 ft 7. My head does not get protected, but it’s fine. I also put my small airflow sit lite pad from Gossamer Gear under my feet.. though it was not needed but I had it with my kumo, so figured I may as well use it. This will be my third year of winter camping in my hammock and so far it works.
I will say, when the temperature drops to O degrees or below, I use my O degree under quilt, and that one is a regular length!!