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Stay warm and flexible all winter with the Beneunder AirBloom 4.0 Insulated Pants. Built with a patented 3-layer thermal system — heat-storage core, moisture-resistant insulation, and a windproof outer shell — these thermal trousers deliver warmth equal to 800-fill down while staying lightweight and breathable. Engineered with 3D Dynamic Waist and 4-way stretch crotch panels, they allow unrestricted movement whether you’re hiking, skiing, camping, or commuting in cold weather. With wind resistance under 0.8 mm/s, a moisture regain rate as low as 0.3%, and a slim straight-leg cut, these insulated outdoor pants combine superior protection, comfort, and style for temperatures as low as -5 °C.
Highlights
- Patented 3-layer thermal design: heat-storage, insulation, windproof barrier
- Comparable to 800-fill down, +6 °C warmth boost, 2.3 Clo insulation rating
- Windproof index < 0.8 mm/s, moisture regain 0.3% for dry, cozy wear
- 3D Dynamic Waist + 4-way stretch gusset for free movement
- Straight-leg cut with shaping lines, anti-snow gaiters & adjustable cuffs
Fabric / Lining / Pocket lining / Inner panel / Filling: 100% Polyester – soft, durable, and lightweight with excellent heat retention, providing cozy warmth and smooth comfort for cold-weather wear.
• 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: -5–5°C / 23–41°F
3-Layer Thermal System — Warmer Than 800-Fill Down
Built with a patented 3-layer system — heat-storage core, insulation, and windproof shell — these pants deliver up to +6 °C warmth boost. Tested insulation matches 800-fill down, keeping you warm even with just one layer.
Moisture-Resistant Fibers — Stay Dry, Stay Warm
Engineered with ultra-low 0.3% moisture regain, AirBloom fibers outperform down in damp conditions. They resist clumping and collapse, staying fluffy and insulating through rain, snow, or humidity.
Windproof Shield — Comfort Down to -5 °C
The high-density windproof shell blocks air penetration (<0.8 mm/s) and withstands over 15,000 abrasion cycles. Perfect for outdoor use, these pants keep you comfortable and protected in temperatures as low as -5 °C.
3D Dynamic Waist + 4-Way Stretch Gusset — Freedom to Move
The 3D Dynamic Waist expands naturally for zero pressure while sitting. Paired with a 4-way stretch gusset, it gives you unrestricted movement when bending, climbing, or running.