S-King Insoles's manufacture capability for height insoles is widely recognized. S-King Insoles has created a number of successful series, and heel cushion is one of them. The manufacturing of S-King battery heated insoles requires different high efficient testing tools. It will be checked for electric performance by virtue of a test pen, cable fault locator, electric screwdrivers, and thermistor detector. S-King insoles have to go through more than 1,000,000 times of anti-bending tests. After a workout, the product is a good way to clear out built-up lactic acids. It helps relax sore muscles as well as relieving stiffness. The S-King PU insoles have a good massage effect.
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