Foot Relief Insoles all day foot massage glycerin filled shoe insoles Foot Relief liquid filled shoe Insoles cushion every step you take. The glycerin moves as you walk and gives your feet a smooth and gentle all day foot massage by responding to every movement of your Foot Relief liquid filled shoe Insoles cushion every step you take. The glycerin moves as you walk and gives your feet a smooth and gentle all day foot massage by responding to every movement of your body. Our Insoles help protect your feet, legs, and back from the impact caused by hard surfaces.