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).