Highlights
BEST USE: Mountaineering
PERFORMANCE: Cold Climate
WEIGHT: 3lb 3oz | 1459g
COMPRESSED VOLUME: 12.6L
LOWER TEMP RATING: -20°F | -29°C
Shipping & Returns
We use DHL GoGreen (climate-neutral shipping) for orders to Germany, Austria and Czech Republic.
We use GLS for orders to Belgium, the Netherlands and Luxembourg.
For orders with a value below 75€ we charge a shipping fee of 4,95€. We do not charge shipping fees for orders with a value over 75€.
All orders received by 12:00 noon on weekdays are usually shipped the same day. Later orders are usually dispatched the following working day.
Delivery time can take up to three working days Germany-wide and up to four working days for orders outside of Germany, and depends on the shipping service provider.
All orders can be returned within 14 days of purchase. However, for the sake of the environment, please make sure to keep returns as low as possible.
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Description
Gear up for your next high altitude or colder latitude adventure with the Alpine Down Sleeping Bag. The expedition mummy fit provides ample space for winter gear, while the modified Free Flow zip system provides ventilation and versatility. Complex construction throughout and 850+ fillpower, RDS-certified PFC-free Ultra-Dry Goose Down delivers maximum warmth retention.
Design Details
Technical Features
The second highest-lofting down used in any of Sea to Summit’s sleeping bags or quilts. 850+ Fill Power indicates that one ounce (30g) of down will re-expand to over 850 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. The down is responsibly sourced and RDS certified and treated with our non-PFC Ultra-Dry Down™ treatment.
The QuiltLock system uses the snap locks located at the shoulder and foot end of Sea to Summit sleeping bags plus the quilt footbox / quilt straps to secure a quilt to the sleeping bag. This adds thermal performance and versatility to your sleep system: your integrated quilt now works for ultralight summer adventures and turns your three-season bag into a four-season sleep system.
100% of the down used in our sleeping bags and quilts is independently certified to the Responsible Down Standard (RDS). The RDS certifies down against animal welfare requirements and tracks it from the source to the final product. The purchase of RDS certified products demonstrates demand for better animal welfare practices in the down and feather supply chain. Sea to Summit is certified to the RDS. To learn more about RDS visit https://textileexchange.org/standards/responsible-down/
Sea to Summit sleeping bags do not contain PFCs.
Ultra-Dry Down™ uses a non-PFC hydrophobic treatment to ensure it absorbs less moisture and dries more quickly. The treatment does not affect the breathability or the lifespan of the down and lasts through at least 20 washings.
The down used in our sleeping bags is RDS-certified responsibly sourced.
Down and synthetic-insulated sleeping bags utilize a non-PFC DWR treatment on the shell fabric for external moisture repellency. This helps prevent the insulation from becoming damp if the sleeping bag comes into contact with condensation on a tent wall, for instance.
Our 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 right side of the bag (left side on women's bags) provides freedom of movement for both arms, additional ventilation and allows (the top third of) the bag to be folded down as a (mini) quilt when the mercury climbs higher than expected.
Tech specs
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Best UseMountaineering
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Comes WithUltra-Sil™ Compression Bag & Storage Cell
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InsulationRDS certified, 850+ PFC free Ultra-Dry Down
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ShapeExpedition Mummy
| -29C|-20F Regular | -29C|-20F Long |
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Frequently Asked questions
Can two Alpines be zipped together?
No - the Alpine is only available as a left-zipper version
Can the Alpine be used in summer?
An Alpine is really too heavy and bulky to be practical for summer use (we're skeptical of the term "4-season bag")
Is the Alpine available in a size Small?
It isn't. Because of the relatively small numbers produced, we have to stay with the two most popular sizes, Regular and Large
