The present disclosure relates to a product or part thereof to be worn on a users foot. Such a product may be from a group of products and partial products at least comprising: socks to be worn inside shoes inner boots to be worn in outer boots inner boots of ice speed skating boots or of ski boots ankle reinforcing braces to be worn in socks or shoes. The product or partial products comprise an at least partial envelope having an opening for a user to insert a foot therein. Further, the envelope comprises at least one friction reducing element. In particular, Teflon is named nonexclusively as a material from which the friction reducing element may be made.
