Sea to Summit Women's Spark Down 45F Sleeping Bag

About This Item

Temp Rating

35 Degrees or Higher

Insulation Type

Down

Built for women who want minimal weight but maximum comfort in their adventures, the Women's Spark lineup demonstrates Sea to Summit's 100% commitment to building a sleeping bag that's perfect for you. Women's specific shape and body mapping result in warmth and comfort without the weight. RDS-certified 850+ fillpower goose down treated with a non-PFAS Ultra-Dry Down treatment provides superior insulation, while a technical hood and zipper draft tube prevent precious warmth from escaping. A super-breathable 10D liner fabric rounds off the comfort profile, and a 10D shell with a non-PFAS DWR combined with a highly water repellent hood and footbox fabric keep moisture out Couples can zip the full-length zipper Women's Spark to an equivalent Unisex Spark for extra comfort and thermal efficiency

Design:

  • Shaped to fit the way a woman sleeps and engineered to retain warmth where female sleepers need it most, the ultralight 2024 Women's Spark offers serious upgrades in comfort and performance
  • Uses a full-box baffle construction to accommodate extra down and reduce cold spots
  • Expedition mummy bag sizing provides extra space for layered clothing or extra wiggle room
  • Vertical baffles in the chest optimize the position of down to prevent it from moving during use
  • Full side zipper with 2 sliders provides easy access and extra ventilation options
  • Women's specific fit: narrower at the shoulders (for reduced weight) and wider between the hips and knees to allow for a natural, side-sleeping position
  • Zipper draft tube, hood, and front neck draft collar all prevent warmth being lost when needed most
  • Ultralight, breathable 10D nylon liner and a 10D shell with non-PFAS DWR provide comfort and shed moisture. Hood and footbox have a highly water resistant, breathable fabric for extra moisture protection
  • 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)
  • Technical hood and anatomically-shaped footbox provide excellent warmth retention without the claustrophobic feel of some ultralight bags
  • Contoured mummy shape for comfort and efficient insulation
  • YKK #5 zippers with zipper plough provide reliable, snag-free operation

Technology:

  • RDS-certified, 850+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance

Additional Details:

  • Recommended Max User Height: 6’
  • Brand : Sea to Summit
  • Web ID: 23S2SASPRKDWN45FSCSL
SizeRegularLong
Max user height5 ft. 7 in.6 ft. 1 in.
Shoulder width56 in.64 in.
Hip Width52 in.56 in.
Knee Width36 in.39 in.
Weight13.5 oz.15.2 oz.
Compressed Volume2.9 L3 L
Compression Sack3L3L
Fill Weight7.1 oz.8.1 oz.
Temperature4545

REVIEWS

4.9

35 Reviews

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Fabulous Sleeping Bag

Love this sleeping bag. I’m particularly impressed with how small it packs down to and how little it weighs, which is important for me as a bike packer.

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Warm And Compact

Love this bag, I should have spent the money years ago on a bag of this quality instead of trying to save money on a 650 FP bag. It's light, compresses well, and has been super comfortable to sleep in.

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Spark Women's Down Sleeping Bag- 15

I was tried of being cold on camping trip, so I pulled the trigger and bought the Spark bag. I love it!!! I'm 5'4" and went with the regular size bag and when I got it it felt short. I returned for the long and I am so glad I did. This bag is so soft, comfortable, and warm. It packs down but I wish it was a little smaller.

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Warm And Packable Sleeping Bag!

I was pleasantly surprised when I purchased this new sleeping bag - looking for a new down bag, packable, and would keep me warm through the cold Montana nights in Glacier National Park. I found the perfect fit - I have taken it on a few backpacking trips now and look forward to taking it out on more next summer!

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I Brought This Bag On

I brought this bag on the Camino de Santiago. It gave me plenty of warmth when the temperatures dropped down to 40F without making me feel overheated in warmer temps. I only wish that the zipper extended down further. It was lightweight and easy to compress and carry in my 24L backpack. I highly recommend this bag.

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Incredible Bag

I love this sleeping bag, super warm, great loft, and incredibly packable. I have't tested it out below 25 degrees yet but even at 30 I can't zip cause I'm too warm (and I'm usually a cold sleeper!). I switched from a Big Agnes 0 degree womens bag to this one and have been blown away by everything. And I really appreciate that the bag comes with a compression sack!

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Works Great

I love my down sleeping bag from sea to summit. The bag is so soft and comfortable. It fit my body perfectly. The material feels pretty durable. I love the colors.

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Perfect Sleeping Bag For Backpacking

The Summit Spark Down women’s sleeping bag Is incredibly light so great for a backpacking trip. There just enough insulation to give a bit of padding and comfort. I am just over 5 ft and it fits great with some room to spare. I will say that if it is not cool out and you are a warm sleeper then it does get a bit toasty but it is super easy to use the zipper to get some air. I have not yet tried it in super cold temps but am looking forward to it as our entire family loves to camp.

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Light And Easy To Travel With!

I love this sleeping bag! It is so light and easy to pack! I haven’t used it in extreme cold temps but it was enough to keep me toasty warm on a 40 degree night. I would recommend this to anyone!

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The Perfect Sleeping Bag!

This is the perfect sleeping bag! It is also the nicest, softest, lightest, sleeping bag I have ever used. It is seriously so light I can hold it up with the tip of my pinky. This would be a great choice for backpacking because it is so light. It also will keep you very warm on cold nights. I love the color scheme too! All around the perfect bag for me!

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Lightweight But Warm

Omg this is the lightest sleeping bag that I ever have. It’s even lighter than my down jacket. We tested it at our backyard for my kids home camp day. It’s really warm enough for 50-ish degrees at night. And it is a women size but definitely could fit in a teen. This would be a perfect sleeping bag for our summer camp at upper north!

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Good

I received this product to give my honest review, I love how comfy it is and this really easy to take it everywhere, the material it’s really good!

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Great Sleeping Bag

This Summit brand Spark Down sleeping bag was the perfect fit for me! I took it on a camping trip and was nice warm and cozy all night long. The only down side to this is getting in or out and being cold again. I would choose this product again.

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Comfortable, And Very Light Weight

This sleeping bag is so soft and light weight, it would be a perfect sleeping bag to take camping in the late spring and summer or backpacking. It’s the perfect sleeping bag for my size, I’m about 5’3 and 170 lbs. It’s snug and warm as well, but I have yet to use it outside of just testing it at home, I’m very excited to take this with me when going camping this year though!

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Warm And Cozy

The Spark Down Sleeping Bag is exceptional! I tried it out and was so impressed with the comfort and warmth! It packs down very small for something that keeps you so warm! I am a tall girl and it is long enough and comfortably roomy. Love the yellow and grey color!!

Read All Reviews (35)