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Key Features
🔥 Extreme Cold Protection, Heat Retention, and Frost Resistance: The inner layer is made of high-density microfleece, which effectively traps body heat and is specifically designed to withstand extreme cold down to -30°C.
💦 Moisture-Wicking, Quick-Drying, Breathable, and Non-Stuffy: Side panels are made of highly elastic, breathable fabric, combined with a skin-friendly, delicate reactive dyeing process to quickly wick away moisture generated during exercise, keeping you dry all day long.
🏃 3D Cut for Freedom of Movement: The ergonomic (Anatomical Cut) snug-fit design, combined with highly elastic fabric, provides ultimate freedom of movement, making it the perfect choice for an outdoor base layer.
🛡️ Meticulous Craftsmanship, Durable and Wash-Resistant: Double-stitched flat seams ensure a comfortable, snug fit at the cuffs and collar; remains soft and flexible even after multiple washes; anti-static treatment eliminates winter wardrobe mishaps.
🎖️ Tactical-Grade Quality: Features the classic 5.11 logo on the chest, available in three colors—Coyote, Black, and Olive Green—with sizes ranging from S to 3XL/4XL.
Product Description
A “Second Skin” Designed for Extreme Environments
Whether for alpine skiing, winter hiking, tactical training, or your daily commute, this 5.11 Tactical Thermal Underwear Set is your most reliable base layer. We understand that heat loss is the biggest enemy during outdoor activities. That’s why we’ve perfectly combined warmth, moisture-wicking, and flexibility.
[Three-Layer Thermal Technology—Say Goodbye to Bulk]
Skin-friendly inner layer: A fine microfleece lining that feels soft to the touch, provides instant warmth upon contact with the skin, and features anti-static properties.
Moisture-Wicking Mid-Layer: High-performance moisture-wicking fibers rapidly transport sweat to the outer layer for evaporation, preventing the “chill effect” caused by cold air after exercise.
High-Stretch Outer Layer: The smooth surface makes it easy to layer under a shell jacket or fleece. The black side panels not only enhance breathability but also create a slimming, three-dimensional silhouette.
[Tactical-Grade Ergonomic Design]
Features a raglan sleeve design, ensuring no restriction in the shoulders or underarms—whether you’re aiming and shooting, rock climbing, or performing wide-range stretches. The highly elastic waistband (4 cm wide) is comfortable without digging in, and stays securely in place.
【Recommended Scenarios】
Outdoor adventures / Tactical training / Winter skiing / Motorcycle riding / Commuting in extremely cold regions / Running and fitness.
Frequently Asked Questions
Q: At what temperature below zero is this thermal underwear suitable for wearing?
A: Based on the product design, the inner micro-fleece layer combines windproof and moisture-wicking properties, making it ideal as a base layer in extremely cold weather down to -30°C (specific performance may vary depending on individual body temperature and the outer windproof layer).
Q: After sweating during exercise, will the base layer stick to my body and feel cold and damp?
A: No. This product features breathable fabric panels on the sides and active dyeing technology for moisture wicking, which quickly draws sweat away from the skin’s surface to keep you dry (Wicks moisture).
Q: Does it run large or small?
A: It features a snug-fit/stretch-fit design. To achieve optimal moisture-wicking and thermal performance, we recommend purchasing your regular size; if you prefer a looser fit, you may want to go up one size. Sizes range from S to 3XL/4XL.
Q: Will it pill, shrink, or become stiff after washing?
A: Made with high-quality reactive-dyed fabric and precision double-stitched construction, it remains soft even after multiple washes, is resistant to stiffening, and has been treated to prevent static.
