What percentage of merino wool should a good hiking sock have?

Most well-regarded hiking socks land between 40% and 70% merino wool, blended with nylon for durability and a few percent spandex/Lycra for stretch. Specialist subreddit threads warn that pure or near-pure merino wears through quickly, so the nylon content is a feature, not a compromise. Reviewers on r/hiking and r/BuyItForLife consistently flag suspiciously cheap 'merino' multipacks as containing far less wool than advertised.