A Safe & Effective Method for all Hot & Cold Therapeutic Treatments. Feature Thermal Gel Beads Our unique slipper design uses Thermal Gel Beads along with a soft foam insole which delivers hours of soothing comfort and relaxation and – they’re Made for Walkin’! Our products out perform and out last traditional grain filled products. These wonder beads not only have the ability to get hotter and colder than grains, but they also retain their thermal properties 3-4x longer! Each specially designed pouch contains thousands of miniature gel beads that flow freely within a non-toxic gel solution enabling the beads to conform to any shape. You will never have to worry about offensive odors from fumigation, or allergies from mildew, mold, or d.