The best Naturehike sleeping bags
Naturehike covers a broad thermal range, from the ultralight 3-season bag to the extreme cold model featuring RDS-certified goose down. This overview presents five references representative of this span, selected to cover very different uses rather than to compete with one another.
How is this Naturehike selection constructed?
The Naturehike CW280, SP400, CW700, SP1000, and UL1100 together cover a range from 10.9°C comfort to -21.4°C comfort, featuring down fill with fill power ranging from 650 to 850 depending on the target insulation level. Each model corresponds to a specific use case: shoulder-season hiking, three-season trekking, mid-mountain bivouacking, extreme cold, and winter expeditions.
This range-based logic avoids the common pitfall of choosing based on brand alone: two Naturehike bags may have very different weights or prices for purely thermal reasons, without either being superior to the other in absolute terms. The right model remains the one that matches the temperature actually encountered on the intended terrain, not the one with the most impressive technical specifications.
Naturehike offers a broader catalog than just these five references, including less expensive synthetic fiber models and double versions for two people. This selection intentionally focuses on down models, which offer the best weight-to-insulation ratio and remain the standard for objectively comparing several temperature levels within a single brand.
⚠️ The temperatures indicated below are ISO 23537 standard thresholds, to be used as a usage guide and not as a guarantee of absolute comfort: humidity, wind, and the insulating mattress used significantly modify the actual experience.
Naturehike CW280: the ultralight 3-season bag
The Naturehike CW280 is rated for a comfort temperature of 10.9°C and a limit of 6.8°C according to ISO 23537, with 800 fill power down insulation and a weight of just 550 g. The price of €139 makes it the entry-level down model in the Naturehike catalog, far from the synthetic fiber models that usually dominate this price bracket.
The mummy cut and high fill power allow this weight to be achieved without sacrificing fill quality, unlike many entry-level bags that compensate for a low price with heavier synthetic fibers. This model is suitable for use from spring to autumn in mid-mountains, as long as the nighttime temperature remains near or above its comfort threshold.
This Naturehike CW280 sleeping bag is suitable for those discovering light bivouacking without wanting to immediately invest in an extreme cold model that is rarely used to its full capacity.
Model mentioned in the article
Naturehike CW280
10.9°C comfort · 550 g · 800 fill power
See product page →Naturehike SP400: the three-season trekking bag
The Naturehike SP400 is rated for a comfort temperature of 3.8°C and a limit of -1.4°C, with 650 fill power insulation and a weight of 820 g, priced at €189. This reference occupies the intermediate segment of the catalog, between summer use and extreme cold.
The adjusted mummy cut remains comparable to that of the CW280, but the comfort temperature is about 7°C lower, at the cost of 270 g of additional weight and a lower fill power (650 versus 800). This model is suitable for spring or autumn mountain trekking, or for summer use at high altitudes where nights remain cool despite the season.
This Naturehike SP400 sleeping bag is designed for versatile use throughout most of the year, excluding periods of extreme cold.
Model mentioned in the article
Naturehike SP400
3.8°C comfort · 820 g · 650 fill power
See product page →Naturehike CW700: the versatile bag for near-freezing temperatures
The Naturehike CW700 is rated for a comfort temperature of -1.7°C and a limit of -7.9°C, with 650 fill power insulation and a weight of 1070 g, priced at €259. This reference marks the transition to the part of the catalog intended for nights near or below 0°C.
The envelope/rectangular cut favors movement comfort over maximum thermal efficiency per gram, a consistent choice for camping or hut use where carried weight matters less than on lightweight trekking. The fill power is identical to that of the SP400 (650); the specification sheet does not detail the amount of down, so the temperature difference between the two models is likely due in part to a higher fill volume, though this cannot be quantified.
This Naturehike CW700 sleeping bag is suitable for moderate winter use, camping, or mountain huts, without aiming for the minimal weight required for long-distance trekking.
Model mentioned in the article
Naturehike CW700
-1.7°C comfort · 1070 g · 650 fill power
See product page →Naturehike SP1000: extreme cold for high altitudes
The Naturehike SP1000 is rated for a comfort temperature of -10.8°C and a limit of -18.6°C, with 650 fill power insulation and a weight of 1650 g, priced at €359. This model is intended for winter outings at altitude where nights drop significantly below 0°C.
💡 At identical fill power (650), the SP1000 weighs 580 g more than the CW700 to gain about 9°C in comfort temperature: the specification sheet does not detail the amount of down, but at equal fill power, this weight difference very likely corresponds to more extensive filling.
This ratio illustrates a general trend: the lower the target temperature, the more additional grams each degree gained costs. A hiker aiming for winter altitude must factor in this increasing cost rather than systematically aiming for the lowest temperature available.
This Naturehike SP1000 sleeping bag is suitable for demanding winter use, in unheated huts, or for mid-to-high altitude bivouacking.
Model mentioned in the article
Naturehike SP1000
-10.8°C comfort · 1650 g · 650 fill power
See product page →Naturehike UL1100: extreme cold expedition
The Naturehike UL1100 is rated for a comfort temperature of -21.4°C and a limit of -31°C, with 850 fill power white goose down insulation (RDS certified, 95% down) and a weight of 1590 g, priced at €1299. This model represents the high-end extreme cold product in the Naturehike catalog.
The 850 fill power explains a controlled weight despite a comfort temperature significantly lower than that of the SP1000: higher quality down provides more insulation for the same mass of filling. However, this model remains an investment reserved for effective use in extreme conditions, such as winter expeditions or off-season high-altitude treks, rather than for occasional use where an intermediate model would suffice.
This Naturehike UL1100 sleeping bag is exclusively suitable for documented extreme cold use, where the -31°C limit temperature remains a theoretical safety threshold rather than a comfort goal.
Model mentioned in the article
Naturehike UL1100
-21.4°C comfort · 1590 g · 850 fill power
See product page →Which Naturehike to choose based on the intended season?
The choice among these five references depends almost exclusively on the nighttime temperature actually expected on the target terrain, not on a quality hierarchy between the models. The CW280 and SP400 cover the majority of spring-to-autumn outings in mid-mountains. The CW700 marks the transition to moderate winter, while the SP1000 and UL1100 are intended for proven winter conditions, with a price difference that reflects the quantity and quality of down necessary to reach these thresholds.
A hiker alternating between multiple seasons often benefits from owning two complementary references rather than a single intermediate model intended to cover all situations: a bag that is too warm for summer, like a bag that is too light for winter, degrades sleep comfort in either case. The insulating mattress used also conditions the end result, regardless of the model chosen from these five references.
The budget follows a progression consistent with the target level of thermal performance: switching from summer use to moderate winter use represents an investment nearly doubled, and access to extreme cold expedition gear increases this budget significantly, reaching €1299 for the UL1100.
The complete Naturehike range offers other intermediate references to refine this choice. To help you make the right choice, our terrain guide and our sleeping bag catalog allow you to cross-reference target temperature, budget, and carried weight according to your practice.
Frequently asked questions
What is the difference between the CW280 and the SP400?
The SP400 features a comfort temperature about 7°C lower than the CW280, at the cost of 270 g more. The choice depends on the intended period of use rather than a difference in quality between the two models.
Is the CW700 as high-performing as the SP1000 despite having the same fill power as the SP400?
The CW700 shares the same fill power as the SP400 but reaches a lower comfort temperature, likely thanks to a higher fill volume, information not provided on the specification sheet. However, it remains significantly less insulating than the SP1000, which has a comfort temperature about 9°C lower.
Why does the UL1100 cost so much more than the SP1000?
The UL1100 uses higher fill power down (850 vs 650) and targets a comfort temperature about 11°C lower. High fill power down is generally more expensive, which partly explains the price difference between these two extreme cold models.
Is one Naturehike model sufficient for all seasons?
Not optimally: a bag calibrated for winter remains uncomfortable in summer due to excess heat, and the reverse exposes you to the cold. Two complementary references cover the seasons better than a single intermediate model.
Can the limit temperature serve as a comfort benchmark?
No, the limit temperature according to ISO 23537 remains a theoretical survival threshold, not a goal for comfortable sleep. The comfort temperature is the benchmark that should be used to choose a model adapted to the intended use.
Verdict: the CW280 (550 g, €139) and the SP400 (820 g, €189) cover common three-season use. The CW700 (1070 g, €259) marks the winter transition. The SP1000 (1650 g, €359) and the UL1100 (1590 g, €1299) remain reserved for proven extreme cold use.
