Experience the ultimate luxury of toasty feet. Booties are made of ultra comfy faux suede and cozy faux shearling. Warm or cold therapy provides soothing relief from strenuous exercise or from an average day"s pounding. A physician formulated blend of 12 soothing, aromatic herbs and 100% natural grains retain heat to keep you warm, relaxed and comfy. One size fits all. Microwave for instant heat therapy or chill for instant cold therapy.