WIND HARD Twilight Lengthen Series -5°C 10D 800FP Ultralight Down Sleeping Bag

Ultralight warmth for backcountry adventures

WIND HARD Twilight Lengthen Series is designed for hikers and backpackers who want lightweight gear without sacrificing comfort. The shell uses 10D ultralight nylon paired with anti drilling technology to minimize wear on rough trails, while 800FP down delivers loft and warmth without adding bulk. The result is a compact, ready-for-the-backcountry sleeping companion that travels as easily as you do.

The bag features a lining scheme with warm seams and no cold spots, so you can settle in with a more balanced feel as you move or shift position through the night. When the package arrives, lay the Twilight flat and air dry to help restore loft and fullness after compression during travel.

Key features and benefits

• Ultralight 10D nylon fabric with anti drilling technology for durability without excess weight.
• 800FP premium down offers impressive loft and warmth retention for a compact footprint.
• Lining with warm seams and no cold spots helps distribute warmth more evenly as you rest.
• Compression stuff sack plus two long and two short pad straps enable quick packing and a stable sleep surface.
• Four back buttons allow easy connection to a compatible sleeping pad, supporting a modular sleep system.

Specs and fit at a glance

• Fill weight: 400 g
• Sleeping bag weight: 584 g
• Total weight: 634 g
• Package size: 17 x 28 cm
• Lengthen option recommended for heights over 175 cm

Temperature guidance and real-world use

Temperature rating indicates a limit of -5°C (23°F) and a comfort level near 0°C (32°F). While the scale is based on rigorous testing, actual warmth depends on ambient conditions, layering, and activity. For best results, dry the bag 1–3 days after use to help restore bulk and warmth.

Care and field tips

• Lay the bag flat and air dry to help regain loft after travel.
• Pair the Twilight with your sleeping pad using the pad straps and back buttons for a stable setup.

Whether you’re tackling late-season treks, hut-to-hut routes, or lightweight car camping, Twilight is built to travel with you. It offers a practical balance of low weight, compact packing, and genuine warmth—presented as possibilities rather than guarantees—so you can plan with confidence and adapt to the conditions you encounter.