Sea to Summit Spark Down Long 0°F Sleeping Bag

About This Item

Temp Rating

-5 to 10 Degrees

Insulation Type

Down

If you're counting grams, but still count on a great night's sleep, the Spark may be the right bag for you.Filled with RDS-certified 850+ fillpower goose down treated with a non-PFAS Ultra-Dry Down treatment, the Spark is constructed with a technical hood and zipper draft tube to retain warmth. Comfort comes from a super-breathable 10 denier liner fabric, while a 10D shell with a non-PFAS DWR plus a highly water repellent hood and footbox fabric shed wind and condensation.The full-length zipper model can be zipped to an equivalent Women's Spark for comfort that couples can share.

DESIGN & DETAILS:

  • Increased breathability in shell and liner fabrics with added water-resistance in the hood and footbox: the 2024 Spark brings more comfort to the realm of ultralight sleeping bags
  • RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
  • Ultralight, breathable 10D nylon liner and a 10D shell with non-PFAS DWR keeps the hood and footbox highly water resistant
  • Technical hood, anatomical footbox and an ergonomic mummy shape-ultralight doesn't have to mean ultralight
  • YKK #5 zippers with zipper plough provide reliable, snag-free operation
  • Baffle construction specific for each use: Sewn through for lighter weight (7°C|45°F), Hybrid box baffles in torso/sewn through in leg area (-1°C|30°F) or full box baffles for maximum warmth (-9°C|15°F)
  • Sea to Summit Guarantee is offered for the Lifetime of this product
  • Brand : Sea to Summit
  • Country of Origin : Imported
  • Web ID: 24S2SUSPRKDWNSLPNCSLC
  • SKU: 26092935

REVIEWS

4.8

60 Reviews

Excellent Bag And Service

I work wildland fire and hunt in the off season. Not to toot my own horn but i get a good sleeping bag when I have one. Comfort and weight are on point. great toe box. I was showing my buddy how light the bag was and he dropped it on a buddy heater. Sea to Summit took care of the whole fix. Absolutely amazing. Simple bag that works as one would want.

The Spark Performs

I just completed a 750 mile section of the Florida Trail in 10 weeks. I slept in the 30 degree Spark every night. Throughout the 10 weeks there were many nights below freezing with temperatures dipping to the mid 20s. The spark performed marvelously! I even slept without a pad and still was comfortable. I wore multiple layers to sleep only once and frequently used my Poncho as a vapor barrier to help insulate. Other hikers complained about being cold when I was cozy and warm. The only complaint I have about this bag is that with the short zipper it can be a struggle to get in and out of sometimes. But I will take the weight savings that come with that feature over a little wiggling. The dampness of Florida nights did not cause the bag to become wet and my fears of carrying a down bag in a humid environment were conquered. A wonderful product all around.

Received incentive

In Progress

I got this as a dual purpose bag. First, an ultra light / ultra compact summer bag. Second, to pair with a 25 degree quilt for winter camping. Tried it once in a fire lookout and was too warm (ditched the quilt). Going to put it through its paces over the next year!

Received incentive

Finally A Cold-weather Bag That Fits A Big Guy (And A Side Sleeper)

I’m 6'4", about 240 lbs—built more like an aging NFL linebacker than a thru-hiker—and this bag actually fits. Plenty of room to move without cold spots, which matters if you’re a side sleeper like me. It’s warm, comfortable, and feels thoughtfully designed rather than scaled up as an afterthought. Build quality is excellent across the board, and both the storage bag and compression sack are noticeably higher quality than what usually gets tossed in. If you’re bigger, move around in your sleep, and still want real 0-degree performance, this bag delivers.

Received incentive

Best Sleeping Bag.

I tried this sleeping bag all the way down to 5°F with layered clothing, and it did fantastic. Super comfortable. I highly recommend.

Read All Reviews (60)