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Sea to Summit Altitude AtI 25 Sleeping Bag (Women's)

Click to enlarge image of Sea to Summit Altitude AtI 25 Sleeping Bag (Women's)
Our Price: $369.95

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Sea to Summit Altitude AtI 25 Sleeping Bag. Incredibly versatile, the Altitude™ women’s down sleeping bag is snug and cozy when it’s cold outside, cool and ventilated when the weather warms, shaped to match your natural sleeping position for comfort anytime, and light enough to carry anywhere.

It could just be the perfect sleeping bag for women adventurers.

IS THIS WOMEN'S DOWN SLEEPING BAG…? Warm enough for shoulder seasons? Yes. The high-lofting down, cozy hood and draft collar, and extra Thermolite® insulation in the foot box provide the warmth you need for cold weather. Choose the 15°F model and pair it with a Women's Comfort Light Insulated.

Really cool in summer temperatures? Yes. The Free-flow zipper system means separate zippers on your left and right side and in the foot box. Open them for ventilation or turn the Altitude into a fully-flat comforter.

Able to be zip together with another sleeping bag? The main side zipper can be zipped to many Sea to Summit Unisex sleeping bags – Regular and Long bags have the same side zipper length.

  • Best Use - Backpacking
  • Performance - 2.5 Season: 25°F (comfort range 25°F to 70°F) | 3 Season: 15°F (comfort range 15° to 60°F)
  • Thermolite® insulation in the foot section warms your feet instantly
  • Down chambers filled using body-mapping to maximize warmth for a woman’s physiology
  • A wider shape between hips and knees to allow you to sleep in a natural position without compressing the down insulation and creating cold spots.
  • Shorter overall length and narrower girth in shoulders to reduce dead space and increase thermal efficiency
  • ULTRA-DRY Down 750+ Loft 90% Down Cluster Premium Duck Down certified Responsible Down Standard (RDS)
  • Thermolite® insulation in the foot section warms your feet instantly
  • Free-flow zipper system: full-length YKK® #5 main side zip, half-length opposite side zip, and foot zip provides unparalleled ventilation and use as a comforter
  • Internal pocket for phone / GPS / valuables
  • Form a snug double sleeping bag by zipping to any Ascent™, Trek™ or Traverse™ sleeping bag
  • Shaped hood, oversized draft collar, and zipper draft tube keep the cold out and the warmth in
  • Includes lightweight Ultra-Sil™ compression bag and storage cell
  • COMES WITH: Ultra-Sil™ compression bag and storage cell
  • ZIP OPTIONS: Free-Flow zipper system
  • BAG SERIES: Altitude 1
  • BAG WEIGHT: Regular - 2lbs 6.1oz / 1080g | Long : 2lbs 9.3oz / 1170g
  • COMPRESSION SACK: S - 10L to 3.3L
  • FILL WEIGHT: Regular - 18.3oz / 520g | Long : 20.5oz / 580g
  • FITS UP TO: Regular - 5 ft 7 in / 170 cm | Long : 5 ft 10 in / 179 cm
  • SEASON RATING: 2.5 Season
  • WOMEN'S TEMP (EN RATING): 25°F / -4°C
  • SHELL FABRIC: Lightweight 20D Nylon Shell
  • INSULATION: Ultra-Dry Down 750+ Loft


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