Rab Women's Ascent 900 Sleeping Bag: 0F Down in Deep Heather - Size: Regular/Left Zip

What Our Gearhead(R) Experts Are Saying:"I brought the Rab Ascent 900 Sleeping Bag on a high-altitude alpine trip and it handled sub-zero nights without any hesitation.

The wide mummy shape gives you noticeably more room to move than a standard mummy cut while still trapping enough warm air to keep you comfortable at zero degrees, and the Nikwax hydrophobic down maintained its loft through a night of heavy condensation inside the tent that would have flattened untreated down."When the objective takes you high enough that the temperature at night becomes a serious variable, the sleeping bag you choose matters more than almost anything else you pack.

The Rab Ascent 900 Sleeping Bag was built for alpine missions where zero-degree performance is not a marketing claim but a genuine requirement, and where the weight and packed size of your shelter system are scrutinized against every ounce of kit on the mountain.

The 650-fill RDS certified Nikwax hydrophobic down provides loft and warmth that stays intact in the damp conditions that high alpine environments generate through condensation and temperature swings, treating every fill cluster to resist moisture absorption rather than relying on a shell treatment alone.

The 30D recycled Pertex face fabric is light and durable with a fluorocarbon-free DWR coating that handles dew and light weather at the surface level.

The wide mummy shape is a deliberate comfort choice for alpine use, giving a woman's body more room to move through the night without the thermal penalty of a full rectangular cut, and the draft tube along the 3/4-length zipper seals out cold air infiltration at the most vulnerable point in the bag's perimeter.

At 52 ounces with a 900-gram fill weight it earns its place in an alpine pack where every gram is justified against the objective.