These are a thinner wool sock but are great quality. Some colors are softer then others however my little guy doesn't pull on them. I think I like the crew style a little better but definitely think having one or two of this length is handy. We aren't in a super cold area but when it does get cold it's a wet cold and sticks to your bones. He's 7 months old but fits in 9 month clothing. I went with the 3-9 month size which fit perfectly. They do get little fuzz balls on them but a sweater saver will help with that.
Would buy again ☺️
Side note: I also purchased the 1-2yr size in the crew style, which fit like 3-9month knee high but with a lot more room in the foot.