Here are the 7 criteria :
Prevent blisters : Zones knitted using specific fibres (Teflon® or Profilen®) help to prevent rubbing and heating during running. This is particularly effective for long training runs and anyone with sensitive feet.
Anti-bacterial : Fibre or specific treatment that limits the development of bacteria and the unpleasant odours that come with them.
Ventilation : Ventilated mesh for perspiration wicking.
Anti-rubbing :Flat seams or seamless at the toes.
Small loop : Soft small loop zones for runners looking for maximum comfort.
Support : Tighter knit mesh on the midfoot to ensure the socks stay in place during running.
Thin : Very thin socks are good for runners who want lightweight socks and more feel during running