Best thermal underwear for men

This garment stands out for its innovative double-layer construction, combining the warmth of Merino wool with the moisture management of LIFA® technology. It is an excellent option for any cold climate, offering a perfect balance between insulation and breathability.

This synthetic top is a versatile base layer that combines polyester and elastane with Omni-Heat™ and Omni-Wick™ technologies. It offers reflective warmth, moisture-wicking, and anti-odor treatment, ideal for winter activities.

This set is an annual bestseller, made from recycled polyester that traps heat and actively manages moisture. It is ideal for alpine and winter activities, offering an optimal balance between thermal insulation and breathability.

This Carhartt thermal shirt is a reliable and durable option for a base layer system in cold conditions. Its abrasion-resistant construction and flat seams ensure comfort and longevity, ideal for work or demanding activities.

This thermal set is a versatile option that wicks moisture and has a fleece lining, offering great elasticity. It is ideal for those who work outdoors year-round and need an extra layer that provides warmth and flexibility.

This thermal underwear set is extremely comfortable and soft, with a lining that provides impressive warmth. It is ideal for winter sports and outdoor adventures, offering a lightweight and flexible design for unrestricted movement.

This original Under Armour performance base layer is ideal for cold-weather sports, offering warmth without bulk. Its double-layer fabric with a brushed interior and quick-drying exterior, along with ventilation panels, ensures comfort and performance.

This top is a constant favorite for its 100% ZQ Merino wool fabric, which offers superior thermoregulation and odor resistance. Its updated design for 2026 makes it ideal for a wide range of cold-weather activities, from skiing to hiking.

This top is a bestseller for its 100% 200 g/m² Merino wool fabric, which provides exceptional softness and natural odor resistance. It is a versatile garment, ideal for daily wear and snow sports, maintaining an optimal body temperature.

This thermal shirt is an effective option for daily wear in cold climates, standing out for its softness and ability to prevent odor spread. Additionally, it wicks moisture, making it a comfortable and functional garment for everyday use.

This Decathlon garment is a versatile and accessible option that combines Merino wool with synthetic fibers. It offers excellent value for money for those seeking the properties of Merino wool without a high cost, ideal for mountain trekking.

These thermal pants offer excellent value for money with 100% superfine 17.5-micron Merino wool. They are soft, non-itchy, and provide effective thermoregulation, being very comfortable for daily wear in cold climates.

This top is perfect for high-intensity activities in cold climates, thanks to its Syncrino 125 fabric that combines Merino wool and polyester. It offers an optimal balance between insulation, moisture-wicking, and durability, drying quickly.

The Flylow Hanmer stands out for its exceptional durability, being 50% stronger than other Merino garments thanks to its blend with nylon. It offers warmth, breathability, and impressive odor resistance, ideal for intense use without pilling.

Considered the best overall, this revised version for 2026 uses the Nuyarn method to maximize the qualities of Merino wool with a touch of nylon. It is very light and offers supplementary warmth, ideal for backpacking trips and for sleeping.

This Joma thermal shirt is made with elastic synthetic fabric that adapts to the body like a second skin. Its seamless design and jacquard finish for wicking sweat make it ideal for outdoor sports in winter, allowing freedom of movement.