Sea to Summit Spark Down 39F Sleeping Bag

About This Item

Temp Rating

15 to 30 Degrees

Insulation Type

Down

Design:

  • 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
  • Zipper draft tube, hood, and front neck draft collar all prevent warmth being lost when needed most
  • Ultra-light 7D and 10D fabrics for minimal weight and packed size
  • Contoured mummy shape for comfort and efficient insulation

Technology:

  • RDS 850+ Loft Premium Goos ULTRA-DRY Down™ for maximum insulation valve

Additional Details:

  • Recommended Max User Height: 6’
  • Brand : Sea to Summit
  • Web ID: 23S2SASPRKDWN30FSCSL
SizeRegularLong
Max user height6 ft. 1 in.6 ft. 6 in.
Shoulder width61 in65 in.
Hip Width53 in.57 in.
Knee Width40 in.44 in.
Weight1 lb. 1.4 oz.1 lb. 2.9 oz.
Compressed Volume4.5 L5.1 L
Compression Sack8L8L
Fill Weight9.3 oz.10.8 oz.
Temperature3939

REVIEWS

4.8

51 Reviews

Scary Light

I get cold very easy, even in warmer temps. I was so nervous to try out this bag, because it feels super lightweight and airy. I thought it couldn’t possibly be warm enough. I got the chance to test it out recently, and even brought an extra bag just in case I needed to double up. No sir! I slept snug as a bug the entire trip. Not only is it cozy and lightweight, it also packs down small. Perfect for fitting in a suitcase, backpacking, or even alpine.

Great 👍🏾

Slept great on the air pad and tucked nicely in the spark. Temps down to 30 degrees and woke up with frost on the ground. The 15 degree sleeping bag did great.

Spark Down Sleeping Bag

This is a great little bag that I actually use for all sorts of warm weather things, including when I’m traveling in a hotel room and I don’t like the sheets! It also packs into something the size of a Nalgene bottle, which is incredible to me. Great product.

Super Warm And Light

This thing is so cozy and I loved the footroom and fabric that repels moist

I Love This Product!

Truly a best in class sleeping bag for backpacking, I love it! Retains body heat well, great product!

Read All Reviews (51)