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 inside a merino sleep sack. * Long sleeves keep baby"s arms warm while sleeping and naturally low fire risk compared to cotton and synthetic fabrics - non irritating. * Pajama top features a cross-over neckline for ease of movement and pajama pants have a slim-fit style and are perfect for layering. * Machine Washable.