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Highlights
Best Use: Ultralight Backpacking
Performance: 2 Season
Weight: 1lb 5.8oz | 619g
Compressed Volume: 5.3L
Lower Temp Rating: 30°F | -1°C
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-PFAS Ultra-Dry Down treatment - is wrapped in extremely breathable 10D fabrics. The Free-Flow Zip system ensures maximum ventilation and the flexibility to ...
Product Details
- RDS-certified, 950+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
- Featherweight 10D nylon shell with non-PFAS DWR, and a highly breathable 10D nylon liner for enhanced comfort
- Technical hood, anatomical footbox and an ergonomic mummy shape - ultralight doesn't have to mean ultratight
- Free-Flow Zip System: YKK #5 side zipper with zipper plough for reliable, snag-free operation. YKK #3 footbox and shoulder zipper for minimal additional weight
- Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout
- Front draft collar is fitted around the neck and oversized at the shoulders to retain warmth
- Sea to Summit Guarantee is offered for the Lifetime of this product
Find Locally
Sea to Summit tests its sleeping bags for their temperature rating using the ISO 23537 test protocol. This test gives two key ratings: Lower Limit and Comfort Rating.
Lower Limit: The lowest temperature at which a man should stay warm.
Comfort Rating: The lowest temperature at which a woman should stay warm.
Sea to Summit Women’s-specific sleeping bags are listed using the Comfort Rating. Unisex bags are listed using the Lower Rating. For example, if the bag is rated at Lower Limit of 14°F | -10°C and Comfort rating of 27°F | -3°C, it should keep a woman warm down to 27°F | -3°C and a man warm down to 14°F | -10°C, if they are wearing warm clothes and using a good sleeping pad.
Remember: These ratings are just guidelines. Movement, weather, and your gear setup can all affect how warm you actually stay.
Pro Tip: Think of your sleeping bag, pad, and liner as a system. If you expect 28°F | -2°C weather, choose a sleeping bag rated for 23°F | -5°C, use a sleeping pad with an R-Value of 3 or more, and add a liner for extra warmth.
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-PFAS 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.
- RDS-certified, 950+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
- Featherweight 10D nylon shell with non-PFAS DWR, and a highly breathable 10D nylon liner for enhanced comfort
- Technical hood, anatomical footbox and an ergonomic mummy shape - ultralight doesn't have to mean ultratight
- Free-Flow Zip System: YKK #5 side zipper with zipper plough for reliable, snag-free operation. YKK #3 footbox and shoulder zipper for minimal additional weight
- Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout
- Front draft collar is fitted around the neck and oversized at the shoulders to retain warmth
- Sea to Summit Guarantee is offered for the Lifetime of this product
Design Details
Technical Features
950+ Loft Ultra-Dry Down
Free Flow Zip
Responsible Down Standard (RDS)
Non-PFAS
Tech specs
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Best UseUltralight Backpacking
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Comes With40D recycled, bluesign APPROVED nylon compression bag
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InsulationRDS certified, 950+ non-PFAS Ultra-Dry Down
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ShapeMummy
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Zip OptionsFree-Flow zipper system
| 30°F Regular | 30°F Long | 15°F Regular | 15°F Long | |
|---|---|---|---|---|
| Bag Weight | 1lb 5.8oz 619g | 1lb 7.7oz 672g | 1lb 11.7oz 784g | 1lb 14.4oz 861g |
| Compressed Volume | 5.3 L5.3 L | 5.5 L5.5 L | 7.0 L7.0 L | 7.9 L7.9 L |
| Compression Sack | 8 L8 L | 8 L8 L | 13 L13 L | 13 L13 L |
| Fill Weight | 10.9 oz 310 g | 12.6 oz 356 g | 16.9 oz 480 g | 19.4 oz 550 g |
| Fits Up To Height | 6 ft 1 in 185 cm | 6 ft 6 in 198 cm | 6 ft 1 in 185 cm | 6 ft 6 in 198 cm |
| Temperature Rating (ISO Lower Limit) | 30°F -1°C | 30°F -1°C | 15°F -9°C | 15°F -9°C |
| Women's Temp Rating (ISO Comfort) | 37°F 3°C | 37°F 3°C | 27°F -3°C | 27°F -3°C |
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
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