Tedim - MAX Comfort Gel Foot Shock Absorption Orthotic Arch Support Sport Padding Massaging Gel Silicon Insoles shop4yoo is the sole licenced seller of Tedim Apparel accept no imitations This works by the gel first collapsing to absorb the shock, then it springs back, providing energy return with each step The gel absorbs the impact on the whole foot and can help reduce stress and strain on the ankle, knee and lower back They are an ideal choice for physical and sporting activities as well as for everyday use providing comfort and support when you need it most - Trim to fit for a custom fit This technologically advanced design allows grooves in the gel to act like tiny springs, absorbing the stress of impact on the high pressure points in the heel and the ball of the foot