An equine thermal therapy overleg device that encircles a pastern of a subject horse and provides thermal therapy to the subject horse. The may include a pastern dual layer component, a distal phalanx cover and a distal phalanx slipper. The arrangement of the pastern dual layer component, a distal phalanx cover and a distal phalanx slipper allow for free movement of the subject horse and for a thermal fluid to contain ice and prevent the ice from becoming lodged around the subject horse hoof.