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Meet the Beneunder FlexWarm Outdoor Pants — designed for hikers, commuters, and anyone seeking comfort in winter conditions. Featuring a 3D stretch waist system, thermal fleece lining, and four-way stretch fabric, these pants move with you while keeping you warm and protected. Built with water-repellent, wind-resistant fibers, they ensure reliable performance in temperatures from -5°C to 10°C.
Highlights
- 3D dynamic waist expands up to 9.5cm for all-day comfort
- Brushed fleece lining keeps warmth even at -5°C
- Four-way stretch crotch design adds +6cm legroom
- Water-repellent & wind-blocking outdoor fabric
- Lightweight yet durable — ideal for hiking, camping, daily wear
Fabric / Pocket lining (outer layer / inner layer): 84.2% Nylon, 15.8% Spandex / 92% Polyester, 8% Spandex – highly elastic, warm, and comfortable, offering a smooth touch and excellent shape recovery 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.
You can review our shipping and returns policy here.
Based on moderate activity with a basic inner layer; increase warmth for wind or humidity.
Recommended range: down to -5°C / 23°F

3D Stretch Waist — Expands Without Pinching
Waist panels expand up to 9.5cm, adapting to sitting, bending, or stretching. Unlike fixed waistbands, it reduces tightness and stays comfortable for long hours.

Slimming Waistline — Flattering Without Bulk
The contoured waistband smooths the midsection and enhances natural curves. No bulky layers, just a sleek, flattering silhouette.

Thermal Fleece Lining — Warmth Down to -5°C
Brushed fleece inside wraps the legs with soft warmth, preventing cold spots. Tested thermal retention rate of 30.7% keeps you cozy in chilly weather.

Four-Way Stretch — Freer Steps, Zero Restriction
Stretch fabric and expanded crotch gusset increase legroom by +6cm, supporting deep strides and outdoor mobility without pulling or tightness.

Weather-Ready Fabric — Repels Water & Resists Abrasion
Built with outdoor-grade fabric that blocks drizzle, wind, and daily wear. Perfect balance of lightweight comfort and durable protection.












