Spark Down Sleeping Bag –1°C

Sea to Summit’s Spark –1°C Down Sleeping Bag for Men pairs RDS-certified 850 fill-power Ultra-Dry Down with ultralight 10D nylon shell and liner to deliver high warmth-to-weight performance in three-season conditions. The technical hood, anatomical footbox and half-length YKK® #5 zipper with draft tube seal in heat without adding bulk—ideal for ultralight backpacking down to –1 °C.

Spark –1°C Down Sleeping Bag – Men’s Features

- RDS-Certified 850 Fill-Power Down: Ultra-Dry Down treatment for maximum loft and moisture resistance.
- 10D Nylon Shell & Liner: Ultralight, breathable fabric with non-PFAS DWR on hood and footbox.
- Technical Hood & Anatomical Footbox: Engineered to seal in warmth and prevent cold spots.
- Half-Length YKK® #5 Zipper with Draft Tube: Reduces weight and resists snags while allowing venting.
- Hybrid Baffle Construction: Box baffles in torso and sewn-through baffles in legs optimize warmth-to-weight for –1 °C.
- Sea to Summit Lifetime Guarantee: Ensures product support for life.

Spark –1°C Down Sleeping Bag – Men’s Specifications

- Comfort Rating: 30 °F (–1 °C).
- Fill Power: 850 goose down (RDS-certified, Ultra-Dry Down).
- Shell & Liner Fabric: 10D nylon with non-PFAS DWR treatment.
- Weight: 493 g (1 lb 1.4 oz) Regular , 536 g (1 lb 2.9 oz) Long.
- Compressed Volume: 4.5 L Regular , 5.1 L Long.
- Fill Weight: 265 g.
- Shape: Ergonomic mummy for optimal heat retention.
- Fits Up To: 185 cm Regular , 198 cm Long.
- Includes: 40D recycled nylon compression bag.
- Size Options: Regular (fits users up to 185 cm), Long (fits users up to 198 cm).