My daughter is so picky about seams, wrinkles, and other "problems" with her socks. She wears them perfectly. Enough! Non-stretchy material may be difficult to put on for younger children or those with sensory issues!
Pros
Light mood in the morning! Our school requires blue socks and they go great with our mary jane kids and sneakers.
Cons
Inelastic material may be difficult to put on for young children or people with sensory problems.