You’ll feel dramatic results instantly once you set foot on the most advanced insole ever designed! Made with HyperCel® a unique material that adds spring and energy to every step providing the highest degree of shock absorption gel or foam insert can’t match. The advance triple action design gives unparalleled support and comfort preventing foot fatigue and helps to relieving knee and back pain. Unlike regular insoles, these are long so your toes can move freely preventing cramping. Ladies' measures 7 1/4" x 2 5/8" and Mens' measures 8 1/2" x 3 1/8".