Jojoba is not technically an oil at all — it is a liquid wax, pressed from the seed of a desert shrub. That chemistry matters, because the wax esters in jojoba are remarkably close to sebum, the oil human skin produces for itself. Skin recognises it and takes it up readily.
The practical result is an oil that moisturises without clogging, cleanses without stripping, and keeps almost indefinitely without going rancid — which cannot be said of most of the carrier oils here.
For cold feet it works less by warming than by restoring a skin barrier that dryness and cold have damaged. Skin that holds its own moisture is skin that holds its own warmth.
