As to sturdiness, they've a great lifetime warranty, just exchanged two pairs at a store where They can be carried with no problems. They had both worn from the outer layer of material over the elastic Main and were changed without dilemma. My favourite everyday and hiking socks. To the https://pepper-spray-keychains87639.blog5.net/75733308/a-simple-key-for-orthofeet-socks-unveiled