COLD-WEATHER READY: With a fabric weight of 235 GSM, this heavyweight thermal set is built for colder days. The brushed fleece interior retains warmth, while moisture-wicking and breathable fabric keeps you dry and comfortable. A warmer, more substantial choice than our lightweight active base layer. WARMTH IN MOTION: The long-sleeve crewneck top and stretch-enhanced leggings move with you through every cold-day task. A functional fly adds convenience, and thumbholes help lock in heat. Finished with UV protection and a tag-free design for irritation-free wear. VERSATILE WINTER WEAR: Great for skiing, hiking, or outdoor work, this set is a go-to base layer for active cold-weather days. The smooth, slick exterior fits comfortably under clothing without bunching, making it an ideal foundation for layering. FLEECE-LINED FOR COMFORT: Brushed fleece delivers exceptional softness and warmth, while the smooth, pill-resistant fabric ensures lasting durability. This set is built to feel good, hold up, and keep you comfortable through every winter routine. LIVE IN LAYERS, WINTER READY: For over 50 years, Cuddl Duds has delivered smart, reliable layers made for real life. Explore our full men’s collection - from base layer sets to sleepwear, lounge tops, and scrubs - designed to keep you warm, dry, and comfortable every day of the week. Stay warm, dry, and ready for winter in the Cuddl Duds Men’s Heavyweight Thermal Set. Made with a brushed fleece interior and smooth, pill-resistant exterior, this 2-piece thermal underwear set delivers the perfect balance of warmth and performance. It’s thicker and cozier than your typical base layer - ideal for layering during cold weather, skiing, working outdoors, or just relaxing at home. The long-sleeve thermal shirt features a comfortable crewneck and thumbholes to lock in heat, while the thermal leggings include a functional fly for everyday ease. Both pieces are crafted with moisture-wicking fabric, breathable material, and 4-way stretch for all-day movement and comfort. A tag-free label and UV protection add thoughtful touches for irritation-free wear in sunny or snowy conditions. Whether you're heading out in the snow or lounging by the fire, this thermal base layer for men is built for winter. Stay insulated, stay comfortable, and layer up for cold weather with confidence.