Sea to Summit Altitude AtI Women’s Sleeping Bag (Regular)

$449.00

RRP: $569.00

Be prepared for the unpredictable with the adaptable Altitude™ Series bags. Light, warm, comfortable and most importantly, adaptable. The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it’s not. The half zip on the left side of the bag provides freedom of movement for both arms, additional ventilation and also means the top third of the bag can be folded down as a mini quilt. The full length, two-way right side zip and separate foot zip transforms the bag into a full quilt for when the mercury climbs higher than expected. Engineered for women this sleeping bag provides extra warmth and comfort where its needed most.

AAT1WR-en-rating



Only 1 left in stock

Sea to Summit Altitude AtI Women’s Sleeping Bag (Regular)

Be prepared for the unpredictable with the adaptable Altitude™ Series bags. Light, warm, comfortable and most importantly, adaptable. The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it’s not. The half zip on the left side of the bag provides freedom of movement for both arms, additional ventilation and also means the top third of the bag can be folded down as a mini quilt. The full length, two-way right side zip and separate foot zip transforms the bag into a full quilt for when the mercury climbs higher than expected. Offering the perfect backpacking balance of comfort vs weight, the Altitude™ Series sleeping bags have more space than traditional mummy bags, yet still provides the thermal efficiency you need when exploring above the tree-line. The mixed baffling on this bag prevents the down filling from moving away while you sleep, eliminating cold spots. This sleeping bag also features a contoured mummy shape and is made from premium RDS certified goose down for efficient insulation. Engineered for women this sleeping bag provides extra warmth and comfort where needed.

Altitude Sleeping Bag Features:

  • Designed for extreme cold and high-altitude conditions
  • Women’s specific tapered rectangular shape for perfect balance of space and adaptable warmth
  • Free-Flow half left side, full length 2 way #5 YKK right side and separate foot zips for freedom of movement, increased ventilation and dual-use as a quilt
  • Large internal security pocket
  • Zip Coupling: This bag is designed to pair with another
  • Includes lightweight Ultra-Sil™ compression bag and storage cell
  • Mixed baffling – vertical upper & horizontal lower
  • RDS Certified Down

EN Rating:

The EN13537 is a European standard for sleeping bags that provides three temperature levels to help guide you when choosing a bag.

Comfort – The temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you are female or consider yourself a cold sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for.

Lower Limit The temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper, use this rating to decide the coldest temperature the sleeping bag is suitable for.

Extreme This is a survival only rating for a standard woman. Between the lower limit and the extreme rating a strong sensation of cold must be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only; we do not recommend you rely on this rating for normal use.

AAT1WR-en-rating

 

Free Flow Zip System

The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it’s not. The half zip on the left side of the bag provides freedom of movement for both arms, additional ventilation and also means the top third of the bag can be folded down as a mini quilt. The full length, two-way right side zip and separate foot zip transforms the bag into a full quilt for when the mercury climbs higher than expected.

Engineered for Women

Using anthropometric data to reveal how best to cater for a woman’s size and weight distribution, the way they store heat and the way they sleep (on their side, mostly), the Sea to Summit women’s specific mats are wider from hip to knee and narrower at the shoulder. A thicker THERMOLITE® layer in the women’s air mats and a unique Delta Core™ profile in the women’s self inflating mats translates to warmer core body zones.

750+ Loft

750+ Fill Power indicates that 1 oz of down will re-expand to over 750 cubic inches after compression. Higher loft means that less down can be used to achieve the same temperature rating – important for performance sleeping bags. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) – a copy of the certification is supplied with every Sea to Summit sleeping bag.

ULTRA-DRY Down™

ULTRA-DRY Down™ is a permanent nano-level water repellent polymer treatment applied to our down which protects it from external moisture and condensation from inside the bag virtually eliminating the negative effects moisture has on down.

 

Specs

Size: Regular

750+ Loft
Recommended User Height: Up to 170cm
Packed Dimensions: 18 x 40 cm
Volume Compressed: 6.5L
Weight: 1080g
Fill weight: 520g
Internal Chest Circumference: 148cm
Internal Hip Circumference: 148cm
Internal Foot Circumference: 118cm

Material & Construction

The tapered rectangular design gives you additional wriggle room inside the bag, perfect for a side or restless sleeper and an alternative if you find a traditional mummy shape too constricting. The women’s specific fit is wider at the hip and narrower at the shoulder and comes in two lengths. Vertical baffles over the chest section ensure the down insulation cannot migrate or shift to the outside of the bag during sleep, creating cold spots. A side block baffle construction maintains the 60/40 fill ratio, keeping more down on the top of the bag for maximum insulation.

  • RDS 750+ Loft ULTRA-DRY Down™ for superior insulating power
  • Vertical chest baffles prevent down migration and cold spots
  • Oversized draft tube with anti-snag materials, prevents heat loss through zipper
  • Oversized neck draft tube with a dual adjustment system for even cinching and maximum warmth
  • Generously sized hood and dual cord adjustment for maximum warmth retention
  • Anatomically shaped footbox allows maximum down lofting, minimising heat loss from your feet
  • Extra down overall and THERMOLITE® panels under the foot area for additional warmth
  • Super-light 20D Nylon shell and lining fabrics for minimal packed size and maximum breathability

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