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Spark -18C/0F Down
Extreme cold sleeping bag - Men's -
Home delivery from 28/07/2026
60 days to change your mind
No subject to promotional offersThe sleeping Spark -18C/0F Down bag from Sea to Summit is ideal for adventurers who prioritise comfort when expedition conditions become extreme.
The shape of this model has been designed to fit your body shape perfectly, with a resized hood and improved zips. Ultra-lightweight, it has an exceptional weight-to-Warmth ratio, with a fill power of 850+. Compact, this minimalist bag is perfect for long hikes and offers an excellent compromise between volume and performance.
The sarcophagus shape helps to retain maximum warmth, and it is also made fromRDS 850 CUIN down that has undergone a treatment Ultra-Dry™ to make it resistant to moisture, ensuring it maintains its performance in all conditions. Its very lightweight 10D Nylon structure ensures minimal bulk and good breathability. For your comfort, the Spark has sewn-in structures at the torso that prevent it from slipping during the night. This model features a three-quarter length zip and a draft excluder incorporated into the zip to prevent heat loss.
- Optimal heat-to-weight ratio
- Moisture-resistant nib
- 2 closing systems
- Adjustable drawstring hood
- Roof covering attachment Quilt Lock system
- Main zip covering 3/4 of the length with zip guard and 2 sliders
- PFC-free product
Composition :
- Filling : 850 CUIN goose down
- Outer material and Lining: 10D Nylon
| Size | Regular | Wide |
| Dimensions (cm) | 185 x 155 | 198 x 165 |
| Volume compressé (L) | 9.9 | 10.6 |
| Poids (g) | 1113 | 1204 |
| Poids du garnissage (g) | 840 | 945 |
| Responsible Down Standard (RDS) | 100% of the down used in our sleeping bags and duvets is independently certified according to the RDS standard (Responsible Down Standard). The RDS certifies animal welfare requirements and traceability from source to final product. Purchasing RDS-certified products demonstrates demand for better animal welfare practices in the down and feather supply chain. Sea to Summit is RDS certified. |
| 850+ loft Ultra-Dry Down | 850+ Fill Power indicates that one ounce (30g) of down will re-expand to more than 850 cubic inches after compression. A higher fill power means that less down is used to achieve the same temperature, which is important for high-performance sleeping bags. The loft and the quality/composition of the down are independently tested by the International Down and Feather Laboratory (IDFL) - a copy of the certification is provided with each sleeping bag Sea to Summit. The down comes from a responsible source, is RDS certified and is treated with our PFC-free Ultra-Dry Down™ treatment. |
| Quilt Lock System | The system QuiltLock uses the press studs located at the shoulders and feet of the sleeping bags Sea to Summit, as well as the straps, quilt / footbox 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 transforms your three-season sleeping bag into a four-season sleeping system. |
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