Happystp 2nd Generation Super Arch Support Sport Insole High Quality Memory Form The soft and rebound memory foam provides dynamic energizing support and cushioningHigh density memory foam means better quality and long-lasting durabilityNeutral cushioned arch support provides necessary support for people with normal to low foot archAdded cushion under ball of the foot provide better shock absorption and cushioning Instruction for Use:remove the original/manufacture insoles from your shoes place the new Happystep insoles with the original insoles back to backalign the two insoles by lining up the back of the heeluse a mark pen to draw a cutting line by tracing along the toe section of the original insole cut the Happystep insoles along the cutting lineIt is highly recommended:These insoles are designed to replace your manufacture insoles. Please remove your manufacture insoles before inserting our memory foam insolesInsoles should be replaced on a regular basis for better foot health