Sea To Summit Spark -1C sleeping bag with feather 2024

The Spark sleeping bag is the perfect option for lightweight adventures that put comfort first.

The optimal warmth-to-weight ratio and 850+ fill power make this bag as comfortable a choice as it is compact and easy to store.

Features

• Goose down treated with Ultra Dry Down for improved water resistance in wet conditions.
• With a 10 denier nylon shell and lining, these lightweight fabrics offer breathability, protection and effective temperature regulation for optimum comfort outdoors.
• The waterproof and breathable characteristics of 10D nylon offer extra protection and prevent exposure to condensation on the tent walls.
• The mummy cut maximises thermal efficiency and offers better heat retention with a lightweight design for warmth, compactness and outdoor comfort.
• Insulation: 850+ RDS certified goose down, Ultra Dry Down treated for water resistance in wet weather.
• Fabric: 10 denier nylon shell and lining. Hood and foot compartment in waterproof and breathable 10 denier Nylon.
• CUT: Mummy cut: slim fit with generous foot compartment and technical hood to maximise thermal efficiency and minimise bulk and weight.
• Zips: Spark 7C/45F & 1C/30F Main zip - 1/2 length #5 with zip guard and two sliders. Spark -9C/15F & -18C/0F Main zip - 3/4 length #5 with zip guard and two sliders.
• Partition construction: Vertical partitions on chest, horizontal partitions on bottom half and base. SPARK 7C/45F quilted construction sewn throughout. Spark -1C/30F box dividers on top half of bag and sewn-in quilted construction on bottom half. SPARK -9C/15F & -18C/0F box divider construction throughout.
• Collar: Spark 7C/45F & -1C/30F Standard anti-draft collar. SPARK -18C/0F Double draft collar.
• Hood: Fitted technical hood with soft-touch fit. Extra deep for a comfortable feel.
• Draft tube: No draft tube. Spark -1C/30F & -9C/15F & -18C/0F A single down-filled draft tube along the top of all zips.
• Twin bags: Spark 7 & -1 cannot be twinned. Spark -9 & -18: Can be combined with Sea to Summit women's bags.
• Max user size: R: < 185 cm / L: < 198 cm
• Total weight: R:  493 g / L: 536 g
• Padding weight: R: R: 265 g / L: 305 g
• Compressed bag size: 8 L

Technologies

Ultra-Dry 850+ Loft Down
The highest performing down used in all Sea to Summit sleeping bags. The 850+ loft means that one ounce (30g) of down will re-expand to over 850 cubic inches when compressed. A higher loft means that less down can be used to achieve the same temperature, which is important for performance sleeping bags. The loft and quality/composition of the down is independently tested by the International Down and Feather Laboratory (IDFL) - a copy of the certification is supplied with every Sea to Summit sleeping bag. The down is responsibly sourced, RDS certified and treated with the environmentally friendly Ultra-Dry Down treatment.

Quiltlock system
The QuiltLock system uses the snap locks on the shoulder and foot ends of Sea to Summit sleeping bags, as well as the duvet footbox and duvet straps to secure a duvet to the sleeping bag. This adds thermal performance and versatility to your sleeping system: your integrated duvet now works for ultralight summer adventures and turns your three-season bag into a four-season sleeping system.

C0 DWR
Most of our products have already switched to non-PFC C0 water-repellent finishes, and by 2023 our tents and storage units will join them. Our aim is to use 100% PFC-free C0 water-repellent finishes by 2025.

Responsible Down Standard (RDS)
All the down used in our sleeping bags and duvets is independently certified to the Responsible Down Standard (RDS). The RDS standard certifies down against animal welfare requirements and tracks it from source to final product. The purchase of RDS certified products demonstrates the demand for better animal welfare practices in the down and feather supply chain. Sea to Summit is RDS certified.