The Pre-Shipment Inspection (PSI) is one of many types of quality control inspections conducted by Dongguan Shujian Shoes Material Co.,Ltd.. With no exception, heated insoles is also inspected for quality control prior to shipment. This inspection is based on the product's Standard Acceptable Quality Limit specification or on customer request. Based on these criteria and procedures, samples are randomly selected and defects are checked. The Pre-Shipment Inspection helps both ourselves and customers to reduce the potential risk of delivery delay or/and fix or redo products. At last, the product will be photographed to ensure that the order is in perfect condition, complete, and properly packaged for shipment.

Dongguan S-King Limited has won the market's appreciation with the spirit of self r&d and self-innovation. We are a professional manufacturer supplied with heated insoles development and production. The electric socks series is one of the main products of Dongguan Shujian Shoes Material Company. battery heated vest is manufactured by the material of heated vest mens. The product is safe, breathable, and comfortable. Each product has been tested strictly before package according to the requirements of quality management system. Its working temperature has a wide range and can be adjusted.

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