Smartwool's Kids' Classic Thermal Merino Base Layer Bottom uses our super-soft interlocking knit-perfect for layering in cool conditions and great for wearing alone on a mild day. Now your kids can be as warm, dry, and comfortable as you are in your Smartwool(R) base layers! Design: Classic Thermal Merino: Made with 100% Merino wool for natural sweat management, odor-resistance, and temperature regulation. Slim fit is intended to follow the contours of the body Merino wool fabric made with an interlock knit for comfort, breathability, thermoregulation, and odor resistance Merino-lined elastic waistband designed for maximum comfort 100% Merino next to skin Flatlock seam construction designed to help increase comfort and minimize chafing Additional Details Made in Vietnam: 100% Merino Wool. Exclusive of Decoration.