Sea to Summit

Sea To Summit - Spark III Down Sleeping Bag

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  • Regular price $649.95

The Spark™ Ultralight Mummy Sleeping Bag Series spans everything from an ultralight down-filled liner to a mid-winter fast-and-light sleeping bag. Each model uses premium materials and no-frills design to provide cutting-edge performance for the designed end-use.

Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate girth for the performance-oriented backcountry user.



  • ULTRA-DRY Down 850+ Loft 90% Down Cluster Premium Goose Down certified Responsible Down Standard (RDS)
  • 10D shell and 7D liner materials help to achieve the incredible lightweight and compact packed size
  • Includes lightweight Ultra-Sil™ compression bag and storage cell
  • Zipper-length trimmed for gram-saving performance
    • 18°F and 5°F have full-length side zippers
  • Baffle construction
    • 18°F and 5°F are fully baffled.


                                                       18°F REGULAR                               18°F LONG

BAG WEIGHT                                         665g                                                745g

FITS UP TO                                            183cm                                             192cm

SEASON RATING                                     2.5                                                   2.5

TEMPERATURE                               Comfort: -8°C                                 Comfort: -8°C