Kids Merino Wool Base Layer Set – Helly Hansen LIFA® Merino Midweight – Thermal Top + Bottoms

Cold-weather adventures start with a comfortable first layer. The Helly Hansen Kids’ LIFA® Merino Midweight Base Layer Set includes a long-sleeve thermal top and matching bottoms, giving kids a warm, moisture-managing foundation for outdoor school, forest school, skiing, sledding, hiking, winter travel, and everyday cold-weather play. Helly Hansen’s two-layer LIFA® Merino construction combines moisture-moving LIFA® fibers next to the skin with breathable Merino wool on the outside. As kids run, climb, sled, and explore, the inner layer helps move perspiration outward while the Merino wool provides insulating warmth and helps regulate temperature. With midweight warmth, flatlock seams, and an easy-to-layer design, this set fits comfortably beneath fleece, snow gear, rainwear, and winter outerwear—making it a practical foundation for active days outside. Why Parents Love It Complete two-piece set: Includes a long-sleeve thermal top and matching base layer bottoms for easy cold-weather dressing. Moisture management where it matters: LIFA® polypropylene fibers sit closest to the skin and help move perspiration outward during active play. Breathable Merino warmth: The Merino wool outer layer provides insulation, helps regulate temperature, and continues insulating when damp. Midweight without unnecessary bulk: Provides dependable cold-weather warmth while leaving room for fleece, snow gear, and protective outer layers. Comfortable for active kids: Flatlock seams create a smoother feel beneath additional layers. Versatile beyond outdoor school: A practical base layer for skiing, sledding, hiking, camping, winter travel, recess, and everyday outdoor adventures. Built for Real Outdoor Use Winter days rarely happen at one pace. Kids might race through the woods, climb a snowy hill, pull a sled, stop to investigate animal tracks, and then settle down for a snack. A good base layer needs to work through all of it. LIFA® Merino gives the two fabric layers different jobs. The LIFA® inner layer helps move moisture away from the skin during high-energy activity, while the Merino wool exterior adds breathable insulation. Together, they create a practical first layer for kids who move between active play and quieter moments throughout the day. The streamlined design also makes it easy to build a flexible cold-weather layering system. Wear it next to the skin, add fleece or another insulating midlayer when needed, and finish with weather-protective outerwear appropriate for the conditions. Things to Know Midweight base layer: Designed to provide cold-weather warmth while remaining comfortable beneath additional layers. Two-piece set: Includes one long-sleeve base layer top and one pair of matching thermal bottoms. Merino blend: This is not a 100% Merino garment. The fabric combines 57% Merino wool with 43% polypropylene. Designed as a first layer: Wear it next to the skin so the LIFA® inner layer can effectively move moisture outward. Made for layering: Add insulating and weather-protective layers according to temperature, precipitation, wind, and activity level. Fit: Helly Hansen reports that customers generally find this set true to size. Check the current size chart when selecting a size. Product Details Product type: Kids’ midweight thermal base layer set Includes: Long-sleeve base layer top and matching bottoms Material: 57% Merino wool, 43% polypropylene Construction: Two-layer LIFA® Merino Insulation level: Midweight Moisture management: LIFA® polypropylene inner layer helps move perspiration away from the skin Outer layer: Merino wool provides breathable insulation and continues insulating when damp Seams: Flatlock seams Waist: Elastic waistband Manufacturer-listed weight: Approximately 250 g Wool: ZQ-certified Main fabric: Solution dyed Manufacturer product number: 40526 Care Detergent: Use detergent formulated for wool. Washing: Wash inside out. Fabric softener: Do not use fabric softener. Handling: Do not wring. Why ODSS Recommends It For active kids, cold-weather comfort starts with the layer closest to their skin. We like the Helly Hansen Kids’ LIFA® Merino Midweight Base Layer Set because it combines two useful functions in one streamlined layer: LIFA® fibers help manage moisture while Merino wool provides breathable insulation. It is also wonderfully practical for family life. The matching top and bottoms make getting dressed on cold mornings straightforward, while the midweight construction works beneath the fleece, snow pants, rain gear, and winter jackets kids already wear. From forest-school mornings and snowy playgrounds to ski weekends and backyard adventures, this is the kind of hardworking layer made for real outdoor childhoods—and for helping families spend more comfortable time outside together.