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Going Ultralight doesn't have to mean suffering. Sierra Designs Spark thirty degree 800 Fill goose down sleeping bag features Flex between the shoulders and knees, so you get the comfort and thermal benefits, while saving precious ounces. Foot Box Venting lets you customize the climate in the lower half of your Spark, without adding the weight of a full-length zipper. Ultralight speed with full-featured comfort.
Features: - Women Specific Bags are tailored to fit a woman's body (narrower at the shoulders, wider at the hips and sized for height). They also offer more insulation in the torso and foot box region.
- 800-fill goose down - the warmest, lightest insulation available.
- Continuous baffle construction.
- Partial Flex construction - Flex™ technology eliminates constriction, allowing the sleeping bag to move with the user and keeping them warm and comfortable.
- Tuck stiching.
- ½ Zipper to save on weight.
- Draft Tube next to the zipper to prevent cold spots.
- Ultralight Jacket Hood™ reduces the weight of the bag while still keeping warmth and provides a fitted hood for better insulation and decreased heat loss.
- Ergonomicaly shaped footbox for comfort.
- Footbox Vent provides an opening at the bottom of the bag for ventilation. Ideal for warm summer nights after a long day of exertion.
- Snag Free Zipper Tracks™ prevent the dreaded stuck zipper by creating a barrier between the lining and the zipper track.
- Removable Pad Locks™ Attaches bag to sleeping pad to prevent sliding off.
- Right side zipper only.
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| Size |
66 in. x 25 - 28.5 in. x 18 in. |
| Fits To |
5 ft. 5 in. |
| Fill Weight |
12 oz. |
| Loft |
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| Avg. Total Wt. |
1 lb. 9 oz. |
| Stuff Size |
7 in. x 17 in. |
| Temperature |
30° |
| Mateable |
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| Insulation |
800-Fill Goose Down |
| Inner Shell |
22D Polyester |
| Outer Shell |
22D Polyester |
| Zipper Type |
Right Side ½ Zipper |
| Color |
Blue |
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