Layer them under your child's pajamas or bed and although they're lightweight, they'll keep their feet nice and warm. I love them and will tell anyone with a child in winter weather they are awesome.

Very disappointing. I ordered a pink pair and a blue pair. Same size. The pink pair was true to size and fit perfectly. The blue pair was too small. It fits like an 8. I couldn't believe the incompatible sizes made the same product, same size, just a different color.

These thermos are very thin compared to other thermos - even ones I've bought before from the same manufacturer. Also, the size was more worrying. For our little 2 year old they were worn as a crop top. Seriously, the 3T we bought doesn't fit more than a 1 year old. When you order, be sure to order one size up, or even 2.

Ordered to wear under baby clothes in the very cold months. When the item arrived, not only was it a very different color than pictured online, it was also very thin. It was so thin I thought I'd break it if I tried it on. I bought another brand that was also thin to fit under clothes without bunching, but the difference was that the material was springy, durable, and thin in day/night comparison.