10 Best Cold Weather Base Layer 2025 in the United States

The Under Armour Men's Armour HeatGear Compression Long-Sleeve T-Shirt is a solid choice for a cold-weather base layer. Made with 84% polyester and 16% elastane, this shirt offers a strong combination of flexibility and durability. The super-light HeatGear fabric provides excellent coverage while remaining lightweight, making it comfortable for extended wear. Additionally, the material is designed to wick sweat and dry quickly, which is essential for maintaining comfort during intense activities or workouts. The mesh underarm and back panels enhance breathability, preventing overheating even during strenuous exercise.

This can be particularly useful for layering in cold weather when you need to regulate body temperature effectively. The ergonomic design, which keeps seams away from high abrasion areas, is another thoughtful feature that improves durability and comfort. The hybrid raglan sleeve construction allows for a greater range of motion, which is important for physical activities that require flexibility.

However, the ultra-tight, second-skin fit may not be comfortable for everyone, especially those who prefer a looser fit. While the shirt is excellent at moisture-wicking and quick-drying, it is essential to consider that it may not provide sufficient insulation on its own in extremely cold conditions and would need to be paired with other layers. This product is machine washable, which is convenient for easy care. In summary, this Under Armour compression shirt is well-suited for those who need a reliable base layer for cold weather activities, offering comfort, durability, and moisture management. However, its tight fit and potential need for additional layers in very cold conditions are factors to keep in mind.

The Thermajohn Long Johns Thermal Underwear for Men is designed specifically for cold weather, featuring a fleece lining that ensures heat retention and keeps you warm throughout the day. The fabric is a blend of 92% Polyester and 8% Spandex, providing a soft, comfortable feel while also allowing for a 4-way stretch that ensures freedom of movement without chafing or bunching up. This makes it ideal for both outdoor activities and indoor lounging or sleeping.

The moisture-wicking capability is another strong point, as it helps to keep you dry by effectively drawing away sweat and moisture, which is essential for comfort during prolonged wear. Additionally, the material is designed to resist odors, which is a significant benefit for maintaining freshness over time.

On the downside, since the product is imported from China, some users might have concerns about the quality control and ethical production standards. Another potential drawback could be the fit, as sizing might not be consistent for everyone, especially since it's available in a limited size range. Despite these minor issues, the Thermajohn Long Johns Thermal Underwear for Men offers reliable warmth and comfort, making it a solid choice for anyone looking to stay cozy in cold weather.

The Thermajane Long Johns Thermal Underwear for Women is a solid choice for a cold-weather base layer. Made from 92% Polyester and 8% Spandex, the material offers a good balance of durability and stretch. The fleece lining adds an extra layer of softness and warmth, making it comfortable to wear directly against the skin. This can be particularly beneficial for those looking for a cozy and warm base layer during cold weather.

The description suggests it is lightweight enough to be comfortable yet substantial enough to retain heat effectively. The 4-way stretch fabric ensures a snug fit that moves with you, which is great for both everyday wear and more active pursuits. However, the snug fit may not suit everyone, especially those who prefer looser-fitting undergarments.

Moisture-wicking properties are a significant advantage, helping to keep you dry and comfortable throughout the day, and the odor resistance feature is a nice bonus, ensuring you stay fresh even after prolonged wear. This makes the Thermajane Long Johns a practical option for both daily use and outdoor activities in cold weather. For those seeking a reliable and comfortable base layer for cold weather, the Thermajane Long Johns offer a good combination of warmth, comfort, and practicality.