http://www.footreliefinsoles.com/1001/index.htm Foot Relief Liquid Filled Insoles are commonly referred to as a liquid orthotic because of the way they custom form to your foot. The insoles are filled with a liquid called glycerin which helps to cool the foot in hot weather and keep the foot warm in cold weather. Since no one person has the same shape foot the glycerin forms to the whole foot including the arch giving you a customized support. As you walk or run the glycerin gently massages the foot helping to increasing the blood flow in the tissues of the foot preventing soreness from lack of circulation. The liquid also reduces shock to the feet and body by absorbing the initial impact helping to reduce foot, ankle, knee, hip, and back pain. Customers often submit testimonials raving about the relief of common painful conditions such as plantar fasciitis, heel spurs, metatarsalgia, and heel pain to name a few. The strategically placed pressure points help to guide the liquid to the ...