Compressibility
Given the amount of loft in the 7 Summits, this bag compresses very compactly but with slightly more effort than required for all other bags in this category. The sleeping bag also comes with an excellent compression sack.

Warmth
The 7 Summits has a 700-fill composite down structure with an excellent loft – indeed, it is loft that excels that of all other bags in this category. Despite that, it was comparable in warmth to other high-performing bags in this category. The down on the bottom is Downtek treated down which makes the down water repellent, increasing down performance. Additional features, like an extremely generous draft tube, also helped eliminate draft. Users found this bag warm in temperatures dipping into the mid to high 20s but required an extra layer of clothing when temperatures fell to the low 20s. 

Features
Millet’s 7 Summits features a composite down fill and a 3D build for greater loft – which it achieves. The anti-cold flap along the zipper and shoulder collar provide extra coziness and a comfortable hood with a cinchable drawcord for adjustment. The glow in the dark zipper is an excellent feature.  

The 7 Summits also features a ripstop shell and, like all other bags in the category, is water-repellent. There is a small, inside Velcro pocket which is handy for something like a music source and tissues, but too small for larger items such as a phone. 

Overall Comfort
Millet’s 7 Summits is a unisex bag and therefore not specifically shaped to a woman’s body. That said, users found the relaxed mummy shape overall very cozy and warm to the mid 20s.  

Durability
Millet’s 7 Summits held up to wear and tear and showed no marks of use in the testing phase. I do not foresee any durability issues with continued use.