3-season sleeping bags

Astro 500 & Astro 500 SQ 

Weighing just 1000 grams, the Astro 500 down sleeping bag will keep you warm at temperatures down to -4 °C. You'll sleep particularly comfortably at +1 °C or above. This means you are optimally equipped for cool and mild nights in spring, summer and autumn. The sustainably produced 3-season sleeping bag consists of trapezoidal chambers that keep the certified down filling in place at all times. Thanks to the comfortable mummy shape, the Astro 500 provides perfect protection against the cold. Alternatively, you can opt for the Astro 500 SQ blanket sleeping bag, which has a limit temperature of -3 °C, weighs 1300 g and has a pack size of 20 cm x 31 cm. 

Astro Pro 400 

With the Astro Pro 400, you are well protected even at -4 °C. With a pack size of 14 cm x 33 cm, it is perfect for mountaineers who like to camp or sleep under the open sky. The stretchy, snug inner lining makes this professional down sleeping bag particularly comfortable and keeps you warm at the same time. In addition, the 850-gram trekking sleeping bag is excellently insulated and ergonomic thanks to its three-dimensional foot box. 

Exosphere -6° & Exosphere 0° 

The 3-season sleeping bags in our Exosphere series are ideal for temperatures down to 0 or -6 °C. The Exosphere -6° weighs 1300 g, while the Exosphere 0° weighs 1000 g. The ThermoStretch construction seams, high-loft hollow fibre filling and shingle construction ensure a reliable thermal climate. With their robust, functional outer material, these lightweight polyester sleeping bags will accompany you on your adventures in the mountains. 

Orbit -5° & Orbit 0° 

Both the Orbit -5° and the Orbit 0° are ideal as 3-season sleeping bags, as they offer sufficient protection even on cool nights with a limit temperature of -5 °C and 0 °C respectively. They weigh 1400 and 1850 grams respectively and have a pack size of approximately 25 cm x 45 cm. What makes them special is that the outer material of these sleeping bags is manufactured without seams, providing the best possible protection against the cold and wet. In addition, the Orbit models feature thoughtful details such as an inner pocket for valuables and a contoured functional hood. They complement their excellent thermal properties on cool nights with comfortable features.

Three-season sleeping bags are typically designed to keep you warm in temperatures ranging from around +5 °C to -5 °C, depending on the model and insulation. Their materials are breathable to prevent overheating on warmer nights, while providing sufficient insulation for cooler conditions. 

Thanks to this flexibility, 3-season sleeping bags are used for camping, trekking and outdoor adventures where temperatures remain moderate. For extreme winter conditions, however, you should use a special winter sleeping bag.

When choosing your 3-season sleeping bag, pay attention to the manufacturer's temperature specifications. These usually include a comfort temperature, a limit temperature and an extreme temperature. This means that you can feel comfortable in your sleeping bag at a comfort temperature of +5 °C, for example, and can still cope reasonably well at 0 °C (limit temperature). However, the extreme temperature (e.g. -5 °C) will no longer be comfortable in the sleeping bag. It merely indicates the temperature at which you could still survive in an emergency. When buying a sleeping bag, always go by the comfort and limit temperatures, not the extreme temperature. 

The thermal performance varies depending on the material, fit and quality of the sleeping bag. You should therefore think carefully about what you plan to do in order to find the right sleeping bag for the expected temperature range. If you are mainly travelling in summer, a limit temperature of around +5 °C may be sufficient. In spring and autumn, you will need sleeping bags that keep you warm even at 0 °C or -5 °C in our latitudes. The comfort temperature is usually about 3 to 5 degrees higher. 

When making your purchase, also consider whether you tend to feel cold or sweat easily while sleeping. This will help you decide whether you should opt for a warmer or slightly cooler 3-season sleeping bag.

Down
Advantage: Lightweight, compact and with excellent thermal performance
Disadvantage: Sensitive to moisture 

Synthetic fibre
Advantage: Resistant to moisture, easy to care for
Disadvantage: Slightly heavier and bulkier 

Conclusion:
Down is particularly suitable for 3-season sleeping bags when low weight and high insulation performance are key – ideal for dry spring and autumn trips. Synthetic fibre is the more robust choice in changeable weather and high humidity – perfect for versatile adventures, especially in summer.

Deuter has a long and rich history. However, we do not rest on our laurels, but are constantly working to improve our products. We collaborate with outdoor professionals to produce authentic, comfortable and functional backpacks, bags, sleeping bags and accessories. These are our strengths: 

• Robust & high quality: deuter products will accompany you for many years, as we focus on high quality not only in the selection of our materials, but also in processing and production. 
• Individual fits for women and men: Tall athletes with a height of around 1.85 m to 2 m, and women in particular, often struggle to find a backpack or sleeping bag that fits them properly. At deuter, we have developed products in the EL (Extra Long) fit especially for tall people and equipment in the SL (Slim Line) fit adapted to the anatomy of women or petite people with narrow shoulders. 
• Lightness: To reduce the weight of our products as much as possible, we save weight right from the start of production by using special materials. We focus on optimised cutting and ensure that we use as little material as possible. This results in particularly light yet very stable products that do not burden you with additional weight. 
• Perfect fit: As we work closely with athletes, our product developers are able to design our products to be as comfortable, functional and back-friendly as possible. 
• Sustainable: For us, sustainability means not only conserving natural resources, but also social responsibility. As a partner of the Fair Wear Foundation, among other things, we support our employees in the countries where our products are manufactured and promote fair wages and working conditions. 
• Environmentally conscious: For bike backpacks and other outdoor textiles, deuter does not use PFAS for impregnation. These chemicals, which are harmful to health and the environment, are unfortunately still used too often because of their water- and dirt-repellent properties. All deuter products have been manufactured without PFAS since 2020, thus reducing the impact on the environment. The DWR impregnation still ensures that our textiles are water-repellent. 
• Lifetime repair service: We want you to enjoy our products for as long as possible. That's why we offer a lifetime repair service for deuter products. This means you don't have to part with your favourite item and you're helping to protect the environment at the same time.