| Context |
Every man or woman leather shoe has one steel core, except flattie and slop-heel shoes; the steel core is installed between external sole and middle sole in arch part, it is the back of shoes, has the function to keep sole radian and stabilize heel; it is more important to middle-heel and high-heel shoes. Anti-bending rigidity and hardness etc performance indexes are stipulated in leather shoes steel core criterion. When buy shoes, you can use moderate force to press arch part on shoes to see whether there are some distortion or it is soft; if you find heel is askew after wearing the shoes ( not for heel being nailed insecure), or shoes arch is empty or not suitable, you cna inspect whether the steel core has broken; if broken and the shoes are in ´Three-guarantee Period´, shoes can be replaced.
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