Introducing a highly effective layering system the boys Lifa t.shirt from Helly Hansen has been carefully constructed from non itch allergy neutral Merino wool. This lightweight outdoor essential features knee and elbow reinforcement and flat lock stitching - ensuring excellent levels of dryness and comfort., HH Lifa Merino. Dry next to skin., Merino wool warmth. Lightweight first and second layer., Non itch. allergy neutral., Flatlock stitching. Knee and elbow reinforcement., 215 g/m2.