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Ascent Down Sleeping Bag (15°F & 30°F)






























Ascent Down Sleeping Bag (15°F & 30°F)




$469.00













                        Temp Rating
                        





                                15°F
                            

                                30°F
                            









                        Size
                        





                                Regular
                            

                                Long
                            

















                        15°F / Regular 
                        



                        15°F / Long 
                        



                        30°F / Regular 
                        



                        30°F / Long 
                        




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                  Ascent Down Sleeping Bag 
                
              






$469.00














Technical warmth-retaining construction and high-lofting down, room to sleep comfortably, and unmatched ventilation.
+ View tech specs










Temp Rating






15°F


15°F






30°F


30°F












Size






Regular


Regular






Long


Long













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     Highlights


BEST USE:
 Backpacking


PERFORMANCE:
 3 Season


WEIGHT:
 2lb 4oz | 1020g


COMPRESSED VOLUME:
 7.5L


LOWER TEMP RATING:
 15°F | -9°C






 Description






Our most versatile sleeping bag available, in colder temperatures you can cinch down the technical hood, zip up the draft-tube protected zippers and allow the 750+ Ultra-Dry Goose Down to keep you warm. In warmer ...
                      


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 Product Details








Learn more






























Ascent Down Sleeping Bag (15°F & 30°F)




$469.00












Shop now















            
              Description 
            
          





          
            Features 
          
        





          
            Tech Spec 
          
        





          
            FAQ 
          
        





          
            Reviews 
          
        




Design Details 














Description




Our most versatile sleeping bag available, in colder temperatures you can cinch down the technical hood, zip up the draft-tube protected zippers and allow the 750+ Ultra-Dry Goose Down to keep you warm. In warmer conditions, the Free-Flow Zip system lets you unzip in different configurations for superior ventilation and even open up flat to turn the Ascent sleeping bag into a quilt on the warmest of nights. 
 
 All of the above make the Ascent a true three-season backcountry bag, one of very few on the market. Close the snaps at the shoulders, open the footbox zipper and wear the Ascent at camp - hardcore adventures don't have to be hard all the time.


Features








RDS-certified, 750+ fillpower goose down with a non-PFC Ultra-Dry Down treatment to stay drier in damp conditions


Free-Flow Zip System offers excellent temperature regulation and multiple sleeping bag configurations


Thermally-efficient, more relaxed mummy fit, room in the hood to fit an Aeros pillow and the option to zip couple with a compatible Sea to Summit Women's bag to deliver space for two comes standard


Lightweight 20D recycled nylon shell with a non-PFC DWR finish to protect against wind and moisture and a 20D recycled nylon liner for greater comfort


Box baffle construction throughout with vertical baffles in the torso to minimize down shift and maximize the retention of warmth


Sea to Summit Guarantee is offered for the Lifetime of this product




























Design Details


















Technical Features




750+ LOFT ULTRA-DRY DOWN


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750+ LOFT ULTRA-DRY DOWN
The second highest-lofting down used in any of Sea to Summit’s sleeping bags or quilts. 750+ Fill Power indicates that one ounce (30g) 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. The down is responsibly sourced and RDS certified and treated with our non-PFC Ultra-Dry Down™ treatment.








FREE FLOW ZIP


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FREE FLOW ZIP
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.








RESPONSIBLE DOWN STANDARD (RDS)


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RESPONSIBLE DOWN STANDARD (RDS)
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/








Non-PFC


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Non-PFC
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. 














Tech specs




Best Use


Backpacking








Comes With


Ultra-Sil™ Compression Bag & Storage Cell








Insulation


RDS certified, 750+ PFC free Ultra-Dry Down 








Shape


Mummy








Zip Options


Free-Flow zipper system










Imperial


Metric












15°F Regular
15°F Long
30°F Regular
30°F Long


































Customize your comfort with precision


Unzip, unfold, and effortlessly tweak your airflow and sleeping positions as you adapt to changing temperatures and preferences












Stay in sync with your surroundings


Seamlessly transition from a cocoon of warmth to an open vista of fresh air. Transform your sleeping bag to a quilt, two bags coupled together or back to a standard setup












Move around the campsite with ease


With Free Flow, your sleeping bag becomes your trusted companion as you relax, wander about and bask in the great outdoors. It's more than a sleeping bag—it's an extension of your adventure
















Frequently Asked questions








Is the Ascent suitable for colder weather?


Yes - the -9°C/15°F version has high-lofting down, a technical hood and draft tubes that make it great for extended three-season use.






Is the Ascent comfortable in warmer weather?


Yes! The Free-Flow zippers can be opened sequentially for ventilation or to open the bag completely flat as a quilt.






Can the Ascent be zipped to another sleeping bag?


Yes - the Unisex Ascent can be coupled with a Women's Ascent, or zipped together with most STS Women's sleeping bags






Shipping & Returns


Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.
2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).
All orders are eligible for fast and easy returns within 60 days of purchase.
For more details, please check out our 
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