The secret to happy feet is a pair of warm, comfy booties like these! These booties provide soothing relief from exercise or an average day's pounding. A physician formulated blend of herbs in comfy plush booties. Simply microwave, put them on and enjoy. For heat therapy, warm in microwave for 1-2 minutes, depending on desired warmth. Iincrease by 30 second increments as needed. (Check temperature to ensure that warmth is ideal before use.) A light misting of the boots will offer a soothing moist heat. When storing your herbal booties, place in a dry cool place in a ziplock bag to increase their longevity. Doing this will help the aromatic herbs in your booties last for years. Great for travel or whenever you have the chance to put your feet up. One size fits all.