First things first. Smartwool's Kids' Classic Thermal Merino Base Layer Zip T is made with a super soft, mid-weight interlock knit. This versatile Zip-T is great in cool conditions and when kids need to stay warm. And when the sun comes out, just zip the collar down.

Features

• Fit: slim
• Slim fit intended to hug the contours of the body
• Merino wool with interlock knit for warmth and breathability
• 7" center front zipper with anti-chafing chin guard
• Flatlock seam construction minimizes chafing