I resisted getting these for a long time, I didn't understand the point. But NOW I get it. They are great for keeping little legs warm when practicing EC, diaper changing, or crawling on rough surfaces, and more breathable than tights. I have two Baby Legs and two homemade jobbies (my own socks I've cut the feet off of) and the Baby Legs really are better, because they are snug at the top and the bottom, whereas my converted socks are loose on the bottom and saggy where the heels were sewn. These are one-size-fits-all so on a baby with super chunky thighs they could be tight. I have the rainbow and zebra, really cute.