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Meet the Beneunder 4-in-1 Outdoor Shell Jacket — engineered for extreme versatility, waterproof protection, and all-weather warmth. Built with Jech LTShell fabric, it delivers 20,000mmH₂O waterproofing, 12,100g/m²·24h breathability, and abrasion resistance over 18,000 cycles. Inside, the AirBloom 4.0 thermal liner provides +7.5°C warmth boost and locks heat as efficiently as 800-fill down, while resisting moisture and clumping. With its detachable 4-in-1 design, you can adapt from -10°C to 25°C, whether hiking in rain, snow, or sunshine.
Highlights
- Jech LTShell fabric: 20,000mmH₂O waterproof / 12,100g breathability / ≥18,000 abrasion cycles
- AirBloom 4.0 insulation: +7.5°C warmth, outperforms 800-fill down in wet cold
- Four-in-one detachable system: wear outer shell, liner, or both for -10°C to 25°C
- Windproof, oil-repellent, stain-resistant (grade 4-5), with anti-static liner
- Functional details: adjustable hood, drawcord hem, Velcro cuffs, machine washable
Shell & Lining: 100% Nylon (outer layer) / 100% Polyester (inner layer, excluding film) – windproof, water-resistant, and durable with a smooth finish for reliable weather protection.
Inner Jacket: 87% Nylon, 13% Spandex – stretchy and comfortable for easy layering and flexible movement.
Contrast Panels: 82% Polyester, 18% Spandex – soft and resilient, adding comfort and fit stability.
Lining & Pocket Lining: 100% Polyester – smooth, breathable, and easy-care.
Filling: 100% Polyester – lightweight yet warm, ensuring consistent insulation in cold weather.
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• 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: -10–25°C / 14–77°F

Ultimate Protection: Jech LTShell 4-Way Shield
Crafted with Jech LTShell, a 3-layer composite fabric offering windproofing, 20,000mmH₂O waterproofing, 12,100g/m²·24h breathability, and abrasion resistance of over 18,000 cycles. Oil- and stain-repellent (grade 4-5), it shields you from rain, snow, and rugged trails.

AirBloom 4.0 Liner: Warmer than Down in Wet Cold
AirBloom 4.0 thermal liner mimics 800-fill down with a three-layer system, boosting warmth by +7.5°C while resisting moisture with a 0.3% rebound rate. Stays lofty and warm even in damp, cold conditions.

4-in-1 Modular System: Adaptable from -10°C to 25°C
A 4-in-1 modular system lets you wear the shell, liner, or both. The shell alone suits 15°C–25°C, the liner suits -5°C–5°C, and both combined keep you warm down to -10°C. One jacket for three seasons.

Functional Details: Durable & Comfortable
Designed for detail: adjustable hood, inner high-neck collar, drawcord hem, and Velcro cuffs block out wind. Anti-static liner prevents static cling. Fully machine washable for easy care. Reinforced seams withstand 33,000+ abrasion cycles.




































