COLD-WEATHER READY: Help your kids stay cozy in the cold with our heavyweight brushed fleece 235 GSM thermal set - warmer and more substantial than our active lightweight base layers set. The soft fleece interior helps retain body heat, keeping him warm during chilly mornings and outdoor play. WARMTH IN MOTION: Made for movement, this tag-free thermal set includes a long sleeve shirt with thumbholes and easy pull-on leggings with a functional fly for everyday convenience. The 4-way stretch fabric and close-to-the-body fit offer flexible comfort throughout the day. WINTER-LAYER VERSATILITY: Whether he’s layering under snow gear, bundling up for school, or relaxing at home, this set offers breathable, moisture-wicking performance that keeps him dry and comfortable wherever winter takes him. FLEECE-LINED FOR COMFORT: Brushed on the inside for ultra-soft warmth and finished with a smooth, pill-resistant exterior, this set is made to last and feel great wash after wash. UV protection adds extra peace of mind for sunny winter days. LIVE IN LAYERS, WINTER READY: For over 50 years, Cuddl Duds has delivered dependable, feel-good layering essentials. Our boy’s thermal base layers are designed to help him stay warm, dry, and ready for winter adventures. Keep him cozy from head to toe with the Cuddl Duds Boy’s Heavyweight Thermal Set - your cold-weather layering solution for active kids. This 2-piece thermal set for boys includes a long sleeve thermal shirt and leggings for kids, crafted from a warm 235 GSM brushed fleece fabric that locks in heat and keeps him dry. Warmer and thicker than our lightweight base layers, it’s perfect for snow days, school mornings, or outdoor adventures. With moisture-wicking technology, strechy fabric, and a tag-free design, this thermal underwear for boys moves with him without irritation. The pull-on thermal leggings feature a functional fly and full-length coverage, while the long-sleeve thermal top includes thumbholes to help seal in warmth. Plus, the UV protection and pill-resistant finish make it a dependable staple all winter long. Whether he's heading outside to play or staying warm inside, this fleece-lined thermal set is a must-have. It’s everything you need in a pair of long johns for kids - comfort, performance, and cozy protection from the cold.