Sea To Summit Spark Pro Down Sleeping Bag -1°C, 619g

Save $50.00

Model: -1°C REGULAR
Sale price$949.99 Regular price$999.99


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.



  • 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


  • 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


  • 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)


Estimate shipping

You may also like

Recently viewed