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Meet the Beneunder Fast-Dry Thermal Base Layer — designed to combat damp cold while keeping you warm and dry. Built with HeatApex Core technology and 3D-Vents sweat channels, it wicks away moisture in just seconds and locks in warmth even in freezing temperatures down to -15°C. Lightweight yet insulating, this base layer is your all-weather defense for hiking, skiing, and everyday outdoor activities.
Highlights：
- HeatApex Core fibers: fast-dry + lasting warmth
- +35% heat retention, up to -15°C cold resistance
- 6s rapid sweat evaporation, stays dry under pressure
- 3D-Vents zones: targeted sweat release at chest, underarms, and back
- Built-in breathable bra cup for women, replaces sports bra
57.5% Viscose, 38.3% Acrylic, 4.2% Spandex – soft and smooth with a gentle drape, offering lightweight warmth, lasting comfort, and flexible stretch for a flattering fit.
• Free Shipping on all orders.
• 30-day Return: Feel free to send your item back within 30 days of receiving the product.
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Based on moderate activity with a basic inner layer; increase warmth for wind or humidity.
Recommended range: -15°C / 5°F
6-Second Quick Dry — No Sweat, No Chill
Sweat disappears in just 6 seconds, preventing the sticky dampness that chills the body in cold weather. Perfect for high-intensity activity or everyday wear.
HeatApex Core — Long-Lasting Warmth
The HeatApex Core combines far-infrared heat storage with hollow-core fibers, boosting heat retention by 35% and providing up to +1.8°C warmth.
3D-Vents Sweat Zones — Breathable & Fresh
Targeted sweat vents at the chest, back, and underarms accelerate evaporation for a fresh, dry feel even during workouts.
Cold-Resistant to -15°C — Built for the Outdoors
Engineered to withstand damp chill, this base layer keeps you warm in temperatures as low as -15°C — ideal for skiing, trekking, and winter runs.
Built-In Breathable Cup — No Sports Bra Needed
Designed with integrated breathable cups, the women’s version offers support without extra layers, reducing bulk and improving comfort.