Solvent for use in footwear, with:a flat sole base which can be positioned on the top of an inner base area of the footwear;an attachment component which can be attached remotely to the base of the insertion sole; anda majority of attachments arranged on at least one of the top surfaces of the insertion sole base and a bottom surface of the attachment attachment attachment attachment, the attachment attachment attachment attachment attachment attachment attaching by means of at least one of the majority of attachments detachable on the insertion sole base; can be.
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