Sea To Summit Spark Splll -8C Down Sleeping Bag - Unisex


Colour: Grey

Delivery options:

Rocksolid guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, electronics, undergarments and swimwear excluded).
Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


Roomy yet super lightweight, this sleeping bag provides 2.5-season warmth without feeling restrictive. The minimalist design includes only the features you need, purpose built for ultra-light backpacking when every gram counts. Thin fabrics and highly-compressible down take up next-to-no room in your backpack.

  • Ultralight 10-denier shell and 7-denier liner are highly packable
  • Ultra-Dry Down fill uses a water-repellent finish that also provides antimicrobial protection
  • Vertical baffles around torso prevent cold spots
  • 1#3 YKK zipper shaves weight
  • Includes lightweight silnylon compression sack and storage bag

Tech specs

Weight745g (Long Right Zip)
665g (Regular Right Zip)
Ideal for
  • Backpacking
  • Cycle touring and bikepacking
  • 850+ fill-power water-repellent goose down
485g (Long Right Zip)
430g (Regular Right Zip)
  • Baffle
Face fabric
  • 10-denier nylon
  • 7-denier nylon
5.4L (Long Right Zip)
4.6L (Regular Right Zip)
Recommended Compression Sack8L (Long Right Zip)
8L (Regular Right Zip)
Shoulder girth152cm (Long Right Zip)
146cm (Regular Right Zip)
Hip girth132cm (Long Right Zip)
126cm (Regular Right Zip)
Foot girth94cm (Long Right Zip)
88cm (Regular Right Zip)
Additional feature(s)
  • Home storage sack included
  • Stuff sack included
  • Ultralight
Product sustainability
  • Certified Responsible Down
Made inChina

Reviews (110)

4.663636363636364 out of 5 stars with 110 reviews for Sea To Summit Spark Splll -8C Down Sleeping Bag - Unisex

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