Smartwool Youth 1/4 Zip Classic Thermal Merino Boxed Long Sleeve Base Layer Shirt - This kids Classic Thermal Merino Base Layer 1/4 Zip uses our super-soft midweight interlocking knit. This versatile 1/4 zip tee is great in cool conditions and when you need to stay warm. And when the sun comes out, just zip the collar down. With Smartwool base layers, it's that easy. Slim fit is intended to follow the contours of the body 100% Merino wool fabric made with an interlock knit for comfort, breathability, thermoregulation and odor resistance 7in center front zipper with anti-chafing chin guard Flatlock seam construction designed to help increase comfort and minimize chafing Style: SW002818