Sea to Summit Flame Sleeping Bag

The Flame is anatomically cut to be wider at the hips and narrower at the shoulders, which helps minimize dead space. This tailored fit prevents cold spots from forming around your body, allowing the down insulation to heat the space more efficiently.

Yes, it is rated for 15 degrees Fahrenheit, but keep in mind that comfort ratings depend heavily on your personal metabolism, the sleeping pad you use, and what you wear to sleep. For temperatures near the limit, we recommend using a high-R-value insulated sleeping pad to prevent heat loss through the ground.

No, it is not waterproof. The ULTRA-DRY treatment is a hydrophobic coating applied to the down feathers to help them resist moisture and retain loft if they get damp from condensation or humid air. You should still use a dry bag or pack liner to keep the sleeping bag protected during heavy rain or river crossings.

It is highly compressible. With a compressed volume of 7.9 liters, it packs down to roughly the size of a large water bottle or a small loaf of bread, making it an excellent choice for ultralight backpacking where pack space is at a premium.

The Flame is designed as a mummy bag with a specific fit, so it is not intended to be zipped together with other bags. The full-length YKK zipper is optimized for thermal retention rather than coupling.

The 10D nylon is ultralight, which means it is thin and requires a bit of care to avoid snags on sharp gear or rough terrain. Always store the bag uncompressed in a large storage sack when you are not on the trail to maintain the loft of the 850-fill down.