Smartwool  Classic Thermal Merino Base Layer Quarter-Zip - Kids'

I use this as a middle layer to go on runs when it is around 30 degrees. It is light and thin, but still keeps you warm, especially after you warm up. I like the half zip because it keeps the neck warm too. It's also a lot cheaper than many of the fancy running brands too

Got it for my 4 year old girl who refuses to wear most things warm because they are 'not pretty enough', she likes wearing it because 'it's like daddy's'. Now she is warm and unlike a coat I don't need to take it off her when putting her in the car seat.

We love these for our trips out to ski. The kids wear them without complaining. They're light but I think they keep them warm. The bottoms are great too. We do both too and bottom under ski pants and they can ski all day!

Nice light weight base layer. Bought for my kid to use for skiing to match his dad's. Unfortunately, the sizing is off and the sleeves in medium are too short - not even reaching the wrists.

It fits my child comfortably and kept my child warm during outdoor activities, and the bright, fun colors make it look great!

Sizes completely mismatch kids age. I ordered biggest number XL for my 10 year old. It looks and fits like for a 6 year old.

This base layer is super comfortable for my child and fits perfectly. It's soft and keeps them warm!

This quarter zip will be used primarily for skiing as well as over a golf shirt for school.

Good quality shirt, it should be pretty durable because of its thickness.

Used as a base layer. The sleeves are a bit shorter than expected