Our Kids' Classic Thermal Merino Base Layer Crew is made of 100% responsibly sourced Merino wool to help your little ones stay comfortable on snow days and activities in the mountains. With a flatlock seam construction designed to minimize chafing, a crew neck built with set-in long sleeves, and all of the benefits of Merino, this kids' base layer will help them enjoy winter more. Slim Fit100% Merino wool fabric made with an interlock knit for enhanced comfort, breathability, thermoregulation, and odor resistanceCrew neck with set-in long sleevesFlatlock seam construction designed to minimize chafingKnit in Vietnam: 100% Merino Wool Machine Wash Warm Gentle Cycle.Dry Clean.Do Not BleachTumble Dry LowCool Iron As Needed