Our 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® base layers. Features: Slim Fit Our 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 Made in Vietnam: 100% Merino Wool. Exclusive of Decoration. Care Instructions: Machine Wash Warm Gentle Cycle. Dry Clean. Cool Iron As Needed. Tumble Dry Low. Do Not Bleach.