Thermal performance and packability for backpacking
The Aegismax G2 is the technical tool for hikers extending their trekking season to the onset of winter. With a certified sub-zero comfort temperature, it secures sleep without the burden of expedition gear. The goal is to maintain a balanced pack weight while ensuring rapid warming of the interior once the zip is closed, a major asset for cold bivouacking.
Premium fill power and down stabilization
The RDS-certified 800-fill power goose down is stabilized by rigorous internal baffles, preventing the insulation from shifting to the bottom of the bag during the night. This structure eliminates cold spots. Its compressed volume of only 3.3 liters frees up considerable space in your backpack. The IFlex® 15D shell manages internal condensation perfectly.
For hikers facing even harsher conditions requiring an enhanced thermal barrier below -5°C, the robustness of the Black Snow -5°C will logically take over.
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 Aegismax G2 has a comfort temperature of -2°C and a lower limit temperature of -8°C, measured to the EN 13537 standard. These values apply under standard conditions: sleeper in thermal base layers, on an insulated sleeping mat. It is designed for hiking, bivouacking use (3-4 seasons).
The Aegismax G2 is filled with 800 fill power, RDS certified. The Aegismax G2 weighs 1052 g, which places it in the lightweight category.
For multi-day trekking, the main criterion is weight: aim for under 1 kg, ideally between 600 g and 900 g. A high-loft down bag (700 cuin minimum) makes this possible while keeping enough insulation for mountain nights. The comfort temperature should match the area and season: 0°C to +3°C for the Alps and Pyrenees in summer.
Hiking generally means a day outing with no overnight stay, while trekking involves several days of walking with wild camping or nights in mountain huts. The distinction matters when choosing a sleeping bag: on a day hike, no bag is needed. When trekking, weight and packed size become decisive because the bag is carried every day.
In France, night-time mountain temperatures range between 0°C and +10°C in summer depending on altitude and area. A bag with a comfort rating between 0°C and +3°C covers almost all French routes (GR20, GR5, Tour du Mont Blanc) from June to September. Above 3,000 m or outside summer, allow an extra safety margin.