Lightweight and modular bedding for the warmer season
The Naturehike CW280 is designed to make life easier for summer hikers. Forget big, bulky sleeping bags: this model goes completely unnoticed while hiking and offers very pleasant warmth for nights in the plains or at mid-altitude in summer. It is an ultra-light sleeping bag designed for easy use, ideal for those who are new to bivouacking or who are looking to lighten their current gear.
Breathable fabric and thermal modularity
The major advantage of this bag lies in its two-way zipper. If it gets too hot, you can open the bottom to ventilate your feet, or open it completely to use it as a simple camping blanket. The 20D nylon fabric was selected for its high breathability and soft feel against the skin, offering optimal sleeping comfort after exertion, without the "plastic" feel of entry-level models.
280g, 800-fill power down insulation: favorable ratio for summer
The 800 cuin white duck down, with only 280 g of fill, reaches a comfort range around 10°C without needing a large amount of down. This high cuin / low fill weight ratio is what defines this ultralight sleeping bag, consistent with exclusively summer use where the goal is lightness rather than resistance to extreme cold.
20D nylon fabric: skin-friendly with no plastic feel
The 20D nylon outer fabric was chosen for its soft feel against the skin, unlike the stiffer nylon used on entry-level models. This material choice contributes to the direct comfort of this lightweight sleeping bag, without a liner or sleeping bag sheet, for summer nights when the bag is sometimes used in direct contact.
If you wish to extend your bivouac season into cooler nights (around 5°C) and prefer a contoured fit to better retain body heat rather than a blanket shape, the Widesea DS13 sleeping bag will be the ideal step up for just a few grams more.
Why pay more for the same performance?
The Naturehike CW280 was compared with the Millet Light Down 11°. The finding is simple: you get equivalent technical features and warmth without paying the brand premium. Keep your budget for your next expedition.
Data checked against the brands' official product pages — subject to change.
Doubt about which bag is right for you?
The field guide helps you choose based on skill level, temperature, needs, and weight. Support answers specific questions.
Find my bag Contact supportFrequently Asked Questions
The Naturehike CW280 has a comfort temperature of 10.9°C and a lower limit temperature of 6.8°C, measured to the ISO 23537 / GB/T 38426-2019 standard. These values apply under standard conditions: sleeper in thermal base layers, on an insulated sleeping mat. It is designed for hiking, bivouacking use (Summer).
The Naturehike CW280 is filled with 800 cuin. The Naturehike CW280 weighs 550 g, which places it in the ultralight category.
A 3-season sleeping bag is designed for spring, summer and autumn. Its comfort temperature sits between 0°C and +5°C, which covers most wild camps in France up to 2,500 m outside winter conditions. In winter or above 2,500 m, a dedicated cold-weather bag is needed.
A 3-season bag is suited to night-time temperatures between roughly 0°C and +15°C. Below 0°C, thermal comfort is no longer assured without extra equipment (liner, additional sleepwear). Above +15°C, most sleepers will find the bag too warm: venting through the foot zip helps regulate.
For the vast majority of walkers and trekkers in France (GR20, GR5, Tour du Mont Blanc from June to September), a 3-season bag with a 0°C comfort rating is sufficient. A 4-season bag is only needed above 3,000 m outside summer, in winter conditions, or for exposed high-altitude wild camps in autumn.