Merino Kids Long-Sleeve Merino Baby Thermals merino Superfine New Zealand merino fabric keeps your child warm and dry and is 100% natural and allergy-safe - superfine merino wool (195gsm). Perfect for baby to wear out an about Long sleeves keep baby's arms warm and naturally low fire risk compared to cotton and synthetic fabrics - non irritating. Thermal top features a cross-over neckline for ease of movement and thermal pants have a slim-fit style and are perfect for layering. Machine Washable.