Ankle Gauntlet by Swede-o:

The Thermoskin® Thermal Foot Guantlet® is indicated for use with arthritis, diabetes, Raynaud's disease, and cold feet. The Thermoskin lining retains just enough body heat to provide enhanced circulation and a therapeutic effect, while the technologically advanced fabric keeps your skin dry and comfortable. The nonslip bottom helps to ensure firm footing. Univerally designed to fit the right and left legs. Order by Women's and Men's shoe size. Order by Women's and Men's shoe size. The Plantar FXT is universally designed to fit both the right and left feet. Order by Women's and Men's shoe size.

Size Chart: