What Our Gearhead(R) Experts Are Saying:"I've used this on a handful of multi-day treks now, and the wide mummy shape gives me enough room to shift positions without feeling boxed in. The arm access vent has been surprisingly handy for reaching gear inside the tent without unzipping the whole bag."Good sleep on the trail depends on more than just warmth, it depends on room to move, and the Ascent Sleeping Bag delivers both after a long day of trekking or backpacking. The wide mummy shape and sidewall baffles give side sleepers space to shift through the night, while an anatomically fitted hood locks in heat around the head and shoulders. 650 fill power down stays put thanks to L. O. F. T baffle technology, which keeps insulation evenly distributed instead of shifting into cold spots overnight. A zippered arm access vent lets a hand reach out for a headlamp or water bottle without breaking the seal on the whole bag, and an internal stash pocket keeps small essentials close at hand until morning.