evo.com | Helly Hansen Long Underwear Sets > A merino wool and Lifa Stripe polypropylene blend gives the Helly Hansen Graphic Lifa Merino Set a baselayer that stays warm even when your kid works up a sweat on the hill, with flatlock seams that won't chafe under a shell. A fun printed graphic makes it a set they'll actually want to wear. Flatlock Seams for Comfort Printed Graphic LIFA(R) MERINO 57% Merino Wool, 43% Polypropylene Crew Neck Top Tail Drop | Kid's Helly Hansen Graphic Lifa Set 2027 - 9 Blue | Wool