How about credentials for gel ice pack insoles of S-King Insoles?

Dongguan S-King Insoles Limited has multiple certificates, and they are evidence that our company attaches great importance to quality. And we have a third party to regularly check S-King Insoles. For us, the confidence provided by these certificates is twofold: internal management, external customers, government agencies, regulatory agencies, certification bodies, and third parties. With these certificates, we want to be more professional and stand out from other vendors.

S-King Insoles is a manufacturing company in China. With extensive industry experience, we set the standard for the magnetic insoles for shoes market. As one of S-King Insoles's multiple product series, hallux valgus correction series enjoy a relatively high recognition in the market. All materials of S-King heated insoles meet global standards. The S-King heated insoles fit a variety of shoe types with removable insoles. This product is extremely resistant to corrosion. Made of heavy metal composites that have been tested by salt spray, they are not adversely affected by chemicals. S-King insoles have to go through more than 1,000,000 times of anti-bending tests.

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