Spark SpIII Sleeping Bag: 18F Down
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Shop Similar ProductsWhy We Like The Spark SpIII Sleeping Bag
Compressing to the size of your palm, the ultralight Sea to Summit Spark SpIII Sleeping Bag is what we recommend for backpackers, climbers, and cyclists who are looking to go minimalist. Primarily focused on giving you the lightest bag out there, Sea to Summit stuffed the Spark with 850-fill down for the best possible warmth-to-weight ratio. We especially appreciate how this bag's nylon shell is windproof and prevents the down from breaking through, while the smooth nylon lining adds some durability. Going beyond an ultralight design, Sea to Summit added its Ultra-Dry Down treatment to help this bag resist moisture and enhance your comfort regardless of the conditions.
Details
- Ultralight sleeping bag for minimalist adventures
- Ultra-Dry Down 850+ insulation has a high warmth to weight ratio
- UltraDry treatment sheds light moisture
- Mummy shape efficiently maintains warm comfort through the night
- 10D UL nylon shell, 15D nylon lining is abrasion-resistant
- Weighs less than 1.5 pounds for ultralight trips
- Compression sack and storage bag included for convenience
- Item #STS007A
- Material
- [face fabric] 10D nylon, DWR coating, [lining] 15D nylon
- Insulation
- Ultra-Dry Down 850+
- Shape
- mummy
- Zipper
- left
- Max User Height
- [regular] 6 ft, [long] 6 ft 7 in
- Shoulder Circumference
- [regular] 57 in, [long] 60 in
- Hip Circumference
- [regular] 50 in, [long] 52 in
- Foot Circumference
- [regular] 35 in, [long] 37 in
- Bag Length
- [regular] 6 ft, [long] 6 ft 7 in
- Pockets
- none
- Pad Retainer
- no
- Fill Weight
- [regular] 15.2oz, [long] 1lb 1oz
- Degree
- 18F
- European Norm/ISO Comfort Rating
- 29F
- European Norm/ISO Lower Limit Rating
- 18F
- Storage Sack
- mesh
- Stuff Sack
- Ultra-Sil compression
- Stuff Size
- 12.5 x 6in (x-small compression sack)
- Claimed Weight
- [regular] 1lb 7.5oz, [long] 1lb 10.3oz
- Activity
- backpacking, weekend camping
- Manufacturer Warranty
- lifetime
Reviews
Q&A
Overall Rating
4.5 based on 152 ratings
Review Summary
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Selecting an option will reload the available reviews on the pageMarch 19, 2024
Great bag!
[This review was collected as part of a promotion.] Very lightweight and compact bag, and very comfortable and warm.
Originally reviewed on Sea to Summit
March 4, 2024
Great sleeping bag. Light weight,
[This review was collected as part of a promotion.] Great sleeping bag. Light weight, but warm. I used it this past weekend with the temp down to 31 degrees and was very comfortable. Highly recommend.
Originally reviewed on Sea to Summit
March 4, 2024
Amazing sleeping bag
[This review was collected as part of a promotion.] Lightweight, down certification, great size. Loving the sleeping bag. Only down side is what happened to the big cotton storage sacks? Now it is a tiny plastic zip bag they give you that you have to stuff the bag into. That does not seem like a good storage sack that should let your sleeping bag breath and be fluffy. Bring them back! Disappointed that it no longer comes with the bag.
Originally reviewed on Sea to Summit
March 2, 2024
Very light bag. Yet roomy.
[This review was collected as part of a promotion.] Though I have not used the bag yet, I love how light it is and how small it compresses
Originally reviewed on Sea to Summit
March 2, 2024
Great Sleeping Bag
[This review was collected as part of a promotion.] Got this bag and immediately ended up on 2 campouts below freezing. Bag worked great and made me realize how my older bags are not as warm as they use to be. The storage bag and compression sack are very helpful for packing and storing the bag. The only flaw with this sleeping bag is that my kids love it and have claimed it for themselves, so I don't get to use it as often as I normally would.
Originally reviewed on Sea to Summit
February 11, 2024
Super lightweight and great quality
[This review was collected as part of a promotion.] The sleeping bag has really impressed me. Super lightweight, very small when packed into compression bag. Quality in every detail. The only cons, while understandable, is rather short zipper. Making it a bit longer would make it easier to get in and out
Originally reviewed on Sea to Summit
January 23, 2024
This sleeping bag is exactly
[This review was collected as part of a promotion.] This sleeping bag is exactly what I was looking for. Lightweight and perfect for cooler nights hunting in November and December. This will be used for bikepacking trips as well of course.
Originally reviewed on Sea to Summit
January 8, 2024
Good bag, mediocre zipper?
[This review was collected as part of a promotion.] Zipper pull came out on the first use so returning it.
Originally reviewed on Sea to Summit
January 5, 2024
Light but not great
I purchased the Spark 5 degree down bag and was excited at first. The bag weighed about an ounce less than the specifications, which was awesome until I looked closer. There is not enough down to have it spread out throughout the bag any any thickness. It has too many blank spots. Every time it is adjusted the down has to come from somewhere else. I suspect this bag was shorted on down. My other brand 25 degree bag is warmer. The zipper is very frustrating, it requires very specific angles to work and is very light duty, not much fun in the middle of the night. It is the wimpiest zipper I have ever seen on a sleeping bag. The bag is light and good to about 30 degrees compared to other bags.
Originally reviewed on Sea to Summit
December 29, 2023
Hard to beat the spark for ultralight!
[This review was collected as part of a promotion.] I really like the Spark Bag and it's weight is amazing. I'd give it five stars if it was just a bit roomier but i guess for an ultralight bag I shouldn't be expecting it to be roomier. I'd buy again.
Originally reviewed on Sea to Summit
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