Nemo Sonic Down Sleeping Bag -20F/-29C

When winter camping in Canada's backcountry demands a sleeping bag that performs at genuine cold-weather extremes, the NEMO Sonic -20F/-29C is the kind of investment that earns its keep every time the temperature drops hard.

The Sonic is built around 800-fill-power hydrophobic down, certified to the Responsible Down Standard for humane treatment and full supply chain traceability. Overstuffing the baffles ensures loft is maintained even after compression, and the hydrophobic treatment keeps the down performing in the damp conditions that are unavoidable on Canadian winter expeditions. The redesigned draft collar and draft tubes create a secure seal at the neck and zipper that blocks cold air from finding its way in, while the updated profile pulls the bag closer to the body for improved thermal efficiency throughout. Thermo Gill vents at the core let you release body heat during high-output moments without exposing yourself to the cold, a genuinely useful feature in variable mountain or winter camping conditions.