Hot Booties - Heated Slippers for Cold, Achy, or Stressed Feet (Blue) - As Seen On TV Much, much more than slippers Provides comfort and relaxation Perfect for cold, achy, or stressed feet Continuous soothing, radiating warmth The secret is in the sole - filled with natural linseed! Provides comfort and relaxation Available in men"s and women"s sizes Each Hot BootiesTM slipper is filled with natural linseed which absorbs and holds the heat! one minute in the Microwave holds heat for over an hour.