Spark Ultralight Sleeping Bag 28º

Engineered to keep you warm at the lightest weight and smallest compressed size

Highlights

BEST USE: 

Ultralight Backpacking

PERFORMANCE: 

2 Season

WEIGHT: 

1lb 1.3oz | 490g

COMPRESSED VOLUME: 

2.5 liters

The Spark Ultralight Mummy Sleeping Bag Series spans everything from an ultralight down-filled liner, to a mid-winter fast-and-light sleeping bag. Each model uses premium materials and no-frills design to provide cutting-edge performance.Ultralight does not mean ultra-tight: The Spark mummy sleeping bags are snug but still have adequate wiggle room for the performance-oriented, backcountry user.

Features

• ULTRA-DRY Down 850+ Loft 90% Down Cluster Premium Goose Down certified Responsible Down Standard (RDS)
• 10D shell and 7D liner materials help to achieve the incredible lightweight and compact packed size
• Includes lightweight Ultra-Sil compression bag and storage cell
• Zipper-length trimmed for gram-saving performance:
  • 50°F, 40°F, and 28°F have 1/3-length zippers
  • 18°F and 5°F have full-length side zippers
• Baffle construction:
  • 50°F and 40°F have sewn-through construction
  • 28°F has baffles in the torso and sewn through in the leg area
  • 18°F and 5°F are fully baffled
• Shape:
  • 50°F , 40°F and 28°F - Contoured mummy
  • 18°F and 5°F - Broader mummy

Tech Specs

• BEST USE Ultralight Backpacking
• COMES WITH Ultra-Sil™ compression bag and storage cell
• INSULATION Ultra-Dry Down 850+ Loft
• SHAPE Mummy
• SHELL FABRIC Ultralight 10D Nylon Shell
• ZIP OPTIONS Left-side #3 YKK zipper

FAQ

Suitable for cooler temperatures?

Yes. The 5°F or possibly the 18°F will work in late Fall. The Spark 5°F will take you down to winter temperatures when paired with a greater than 3.5 R-Value sleeping mat like the Comfort Light Insulated.

Really suitable as a sleeping bag liner?

Yes. You could use the Spark 50°F, or even the Spark 40°F to boost the performance of a bag for cold-weather use. Adding one of these to a 20°F bag might make more sense than buying a 0°F bag for occasional winter use.

Able to be zipped to another sleeping bag?

No. Even though the 18°F or 5°F have full-length side zippers, they are not designed to be coupled to a sleeping bag with a right zipper (for instance the Flame 18°F or 5°F).