These have got to be the best thick cotton tights I have used on my daughter that is now 15 months. I bought these twice for her last winter and I am buying them again this year.

Pros: - Thick cotton keeps her legs warm
  - Awesome price
  - Wear well with use, didn't shrink in dryer
  - 6-12 Month size fit her perfectly from 6-9 Months until it got warm out
  - Stretchy for proper fit

Cons: - Dirt didn't wash out all the way on knee area. Expected for color white
  - Sizing may be off for babies with a little extra chubby
  - Should come in more color options

I also bought the Tic Tac Toe brand organic socks and I will be writing a review on those after my daughter wears them for a while. Happy Shopping!