This Reima base layer set pairs warm merino wool on the outside with soft, non-itchy lyocell on the inside for balanced thermal control and next-to-skin comfort. Made from a merino-lyocell mix (48% Merino wool, 43% Lyocell, 9% Polyamide), it breathes well and keeps kids warm even when damp, ideal as thermal underwear or cozy sleepwear. It features soft, flat seams to reduce chafing and an elastic waist with a stretchy cut for easy dressing and active play. This premium knit layer doubles as a midlayer under winter clothing or can be worn alone for sleep and everyday warmth. Bright all-over Moomin print adds playful style that children will enjoy while parents appreciate durable, practical design.