Highlights
BEST USE: Ultralight Backpacking
PERFORMANCE: 2 Season
WEIGHT: 1lb 5.8oz | 619g
COMPRESSED VOLUME: 5.3L
LOWER TEMP RATING: 30°F | -1°C
Shipping & Returns
We use climate-neutral shipping:
DHL GoGreen for orders to Germany, Austria and Czech Republic and
GLS Klima Protect 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
The Spark Pro has been optimized for comfort, versatility and light weight. Our highest-lofting down - 950+ fillpower RDS-certified goose down with a non-PFC Ultra-Dry Down treatment - is wrapped in extremely breathable 10D fabrics. The Free Flow zip system ensures maximum ventilation and the flexibility to open the bag flat as a quilt. Zip a Spark Pro to a Women's Spark and share the comfort with your companion.
Design Details
Technical Features
The highest-lofting down used in any of Sea to Summit’s sleeping bags or quilts. 950+ Fill Power indicates that one ounce (30g) of down will re-expand to over 950 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.
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.
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.
Tech specs
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Best UseUltralight Backpacking
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Comes WithUltra-Sil™ Compression Bag & Storage Cell
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InsulationRDS certified, 950+ PFC free Ultra-Dry Down
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ShapeMummy
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Zip OptionsFree Flow zip system
| -1C|30F Regular | -1C|30F Long | -9C|15F Regular | -9C|15F Long |
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Frequently Asked questions
Can two Spark Pros be zipped together?
The Spark Pro is only available with a left zip, but can be zipped to other STS Women's sleeping bags
Is the Spark Pro available as a women's model?
We don't curently offer a women's-specific Spark Pro. The unisex model works for female end-users (who should use the Comfort rating for orientation)
What's the difference between the Spark and the Spark Pro?
The Spark Pro has a footbox zipper and a short right-side zipper (great ventilation, open-flat as a quilt, sit up with armes extended from the bag)
