Sea To Summit Spark -18C sleeping bag with feather 2024

The Spark sleeping bag is the perfect option for lightweight adventures putting comfort first

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

Features

• Ultra Dry Down treated goose 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 optimal outdoor comfort.
• The waterproof and breathable characteristics of 10D nylon offer additional protection and prevent exposure to condensation on the tent walls.
• The wrap-around shape maximises thermal efficiency and offers improved heat retention with a lightweight design for warmth, compactness and outdoor comfort.
• Insulation: 850+ RDS-certified goose down, treated with Ultra Dry Down for improved water resistance in wet conditions.
• Fabric: 10-denier Nylon shell and lining. Hood and foot compartment in waterproof and breathable 10-denier Nylon.
• Fit: Close-fitting mummy fit with generous foot compartment and technical hood to maximise thermal efficiency and minimise volume and weight.
• Zips: Spark 7C/45F & 1C/30F Main zip - Length 1/2 #5 with protector and two sliders. Spark -9C/15F & -18C/0F Main Zip - Length 3/4 #5 with protector and two sliders.
• Partition construction: Vertical partitions on top, horizontal partitions on bottom half and base. SPARK 7C/45F quilted construction. SPARK -1C/30F box partitions on top half and quilted construction on bottom half.
• SPARK -9C/15F & -18C/0F full-length box partition construction.
• Collar: Spark 7C/45F & -1C/30F Standard windproof collar. SPARK -18C/0F Double windproof collars.
• Hood: Close fitting technical hood with soft touch adjustment. Extra deep for a comfortable feel.
• Anti-current tube : No anti-current tube. Spark -1C/30F & -9C/15F & -18C/0F A single down-filled anti-current tube along the top of all zips.
• Bag coupling: Spark 7 & -1 cannot be coupled. Spark -9 & -18: Matches Sea to Summit bags for women.
• Maximum user size: R: < 185 cm / L: < 198 cm
• Total weight: R: 1113 g / L: 1204 g
• Padding weight: R: 840 g / L: 945 g
• Compressed bag size: 20 L

Technologies

Ultra-Dry 850+ Loft
The highest performance down used in all Sea to Summit sleeping bags. The 850+ filling power means that one ounce (30 g) of down will expand by more than 850 cubic inches after compression. A higher filling power means that less down can be used to achieve the same temperature, which is important for performance sleeping bags. The loft and down quality/composition are 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 press studs at the shoulder and foot ends of Sea to Summit sleeping bags, as well as the quilt foot box and quilt straps to attach a quilt to the sleeping bag. This adds thermal performance and versatility to your sleeping system: your integrated quilt 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 systems will follow them. Our goal is to use 100 per cent PFC-free C0 water-repellent finishes by 2025.

Responsible Down Standard (RDS)
The entire down used in our sleeping bags and quilts is independently certified to the Responsible Down Standard (RDS). The RDS standard certifies down according to animal welfare requirements and ensures its traceability from source to end product. Purchasing RDS certified products demonstrates the demand for better animal welfare practices in the down and feather down supply chain. Sea to Summit is RDS certified.