Description

Ultra-light and technical, our Spark™ Series bags are designed to keep you as warm as possible while minimising packed weight and size.

The Spark™ Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible.

The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose down, light-gauge #3 YKK zip and high performance 10D Nylon shell and 7D lining fabrics, set the stage for superior performance. These materials are combined with a contoured mummy design for efficient insulation, and that mummy design is then tweaked for each model to best fit the use scenario.

Our ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and condensation from the inside of the bag, virtually eliminating the negative effects moisture has on down. All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down. The ULTRADRY Down™ protection also makes the Spark™ an impressive hard-alpine or adventure racing bag, where every gram is counted and down has never been a viable option.

Features

• Super-compressible 850+ loft non-PFC ULTRA-DRY Down provides maximum warmth-to-weight ratio
• Ultralight, not ultra-tight: Hooded contoured mummy shape for comfort and efficient insulation
• Vertical torso box baffles maximises warmth around your core and prevents down shift when you move in your sleep
• Sewn-through horizontal baffles in lower part of sleeping bag minimises weight and packed size
• Drawcorded hood and front draft collars help trap warmth
• Draft tube with anti-snag strip prevents heat loss through the zipper
• The half-length #3 YKK zipper with two sliders improves ventilation and further reduces weight and packed size
• Field repairable: The open-end zip allows slider to be easily re-threaded for on-the-go repairs
• non-PFC fabrics: 10D Nylon shell and 7D Nylon liner fabrics are DWR treated and non-PFC
• Ethically sourced down: Responsible Down Standard (RDS) Certified
• Spark and Flame sleeping bags with like sized zips pair together
• QuiltLock System compatible—securely connect any Sea to Summit quilt to your sleeping bag to boost your sleep system’s performance for colder conditions
• Includes a Sea to Summit Ultra-Sil Nano Compression Sack and larger storage cell

Specifications