Sea to Summit Spark Pro -1C Down Sleeping Bag Long beluga black

950+ fillpower goose down in an ultralight mummy shell built for three-season backpacking.

The Sea to Summit Spark Pro -1C Down Sleeping Bag is a mummy-shaped sleeping bag designed for backpackers and outdoor professionals who need reliable thermal performance without excess bulk. RDS-certified 950+ fillpower goose down with non-PFC Ultra-Dry Down treatment delivers efficient insulation, while 10D nylon shell and lining fabrics keep the overall package minimal. The Long size accommodates body lengths up to 198 cm.

Features

• 950+ fillpower RDS-certified goose down with non-PFC Ultra-Dry Down treatment for moisture resistance

• Free Flow zip system: YKK #5 side zipper with zipper plow for snag-free operation; YKK #3 footbox and shoulder zipper

• Opens flat as a quilt; compatible with Women's Spark bag for double configuration

• Hybrid box baffles in the torso, sewn-through construction in the leg area

• Front draft collar fitted at the neck and oversized at the shoulders to seal in warmth

• Technical hood, anatomical footbox, and ergonomic mummy shape

Technical Specifications

• Comfort temperature: -1°C

• Shell and lining: 10D Nylon; waterproof-breathable 10D Nylon hood and footbox

• Shape: Mummy

• Body length: 198 cm (Long)

• Shoulder circumference: 165 cm | Hip: 145 cm | Foot: 112 cm

• Weight: 672 g