Smartwool Kids Made using interlock knit, the super-soft Smartwool® Kids Classic Thermal Merino Base Layer 1/4 Zip tee is perfect for cold days. Slim fit. Pullover style. Stand collar with quarter-zip placket. Long sleeves. Branding on the left sleeve. Straight hemline. 100% Merino wool. Machine wash, tumble dry. Imported. View Zappos.com Glossary of Terms Smartwool Kids Classic Thermal Merino Base Layer 1/4 Zip (Toddler/Little Kid/Big Kid)