Lightweight yet incredibly versatile, the Spark Pro brings enhanced comfort with the Free Flow Zip System. 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 Spark Pro Free-Flow Zip system ensures maximum ventilation and the flexibility to open the bag flat as a quilt and has a footbox zipper and a short right-side zipper for great ventilation, and means you can sit up with arms extended from the bag.
The Spark Pro is EN rated with a lower comfort limit -1°C for men or 3°C for women. Weighs just 619g and packs up small at 5.3L. Comes with a handy ultrasil compression sack and a larger storage cell. A great choice for adventures where low weight and high performance are priorities.
Video
Features
RDS-certified, 950+ fillpower goose down with a non-PFC Ultra-Dry Down treatment for maximum thermal performance
Featherweight 10D nylon shell with non-PFC 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 plow for reliable, snag-free operation. YKK #3 footbox and shoulder zipper for minimal additional weight
Baffle construction specific for each use: Hybrid box baffles in torso/sewn through in leg area (in -1°C version) or full box baffles for maximum warmth (in -9°C version)
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
Specifications
Best use: Ultralight Backpacking
Comes with an 8L Ultra-Sil™ Compression Bag & a Storage Cell
Insulation: RDS certified, 950+ PFC free Ultra-Dry Down
Shape: Mummy
Zip: Free-Flow zipper system
Weight: 619g
Compressed volume: 5.3L
Fill weight: 310g
Temp rating: EN lower limit -1°C for men or 3°C for women
Fits up to height 185cm
FAQS
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 currently 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 arms extended from the bag)
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Description
Lightweight yet incredibly versatile, the Spark Pro brings enhanced comfort with the Free Flow Zip System. 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 Spark Pro Free-Flow Zip system ensures maximum ventilation and the flexibility to open the bag flat as a quilt and has a footbox zipper and a short right-side zipper for great ventilation, and means you can sit up with arms extended from the bag.
The Spark Pro is EN rated with a lower comfort limit -1°C for men or 3°C for women. Weighs just 619g and packs up small at 5.3L. Comes with a handy ultrasil compression sack and a larger storage cell. A great choice for adventures where low weight and high performance are priorities.
Video
Features
RDS-certified, 950+ fillpower goose down with a non-PFC Ultra-Dry Down treatment for maximum thermal performance
Featherweight 10D nylon shell with non-PFC 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 plow for reliable, snag-free operation. YKK #3 footbox and shoulder zipper for minimal additional weight
Baffle construction specific for each use: Hybrid box baffles in torso/sewn through in leg area (in -1°C version) or full box baffles for maximum warmth (in -9°C version)
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
Specifications
Best use: Ultralight Backpacking
Comes with an 8L Ultra-Sil™ Compression Bag & a Storage Cell
Insulation: RDS certified, 950+ PFC free Ultra-Dry Down
Shape: Mummy
Zip: Free-Flow zipper system
Weight: 619g
Compressed volume: 5.3L
Fill weight: 310g
Temp rating: EN lower limit -1°C for men or 3°C for women
Fits up to height 185cm
FAQS
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 currently 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 arms extended from the bag)
