Q: What are Foot Relief Insoles designed to do? A: Foot Relief Insoles are fluid filled insoles that have five primary benefits and a long list of secondary benefits. The insoles are designed to cushion, massage, absorb shock, give arch support, and increase circulation. The liquid insole will form to almost any shape foot giving you a customized fit after only a few minutes of wear. Many customers refer to our liquid filled insoles as "liquid orthotics" because of the way the insoles stretch slightly allowing the liquid to fill in the unique arches of your foot providing maximum comfort. Any questions abt Medical Grade liquid silicone rubber for shoe insoles , pls feel free to contact Ms. Abbie: Tel: +86-0755-89311348 Mob: +86-18938867613 Skype: hyjcy@szrl.net Youtuebe: http://www.youtube.com/user/siliconeRTV/videos Facebook: https://www.facebook.com/liu.taylor.3