Helly Hansen Kids LIFA Merino Base Layer Graphic Set - Bright GreenThe perfect combination of Merino and LIFA make these base layers durable and warm. Our warmest base layers, LIFA Merino is a staple with professional athletes and a favorite with kids. Unmatched durability makes these thermals perfect for active kids who play hard. This base layer set is solution dyed for less water waste and the wool is certified by ZQ a third party audited wool standard that requires growers to adhere to the best farm management