Sea to Summit Alpine -29C Down Sleeping Bag Long blazing yellow

Expedition-grade down sleeping bag built for high-altitude and cold-latitude conditions.

The Sea to Summit Alpine -29°C Down Sleeping Bag is a single-person mummy bag designed for demanding winter and expedition use. The roomy expedition mummy fit accommodates layered clothing and small gear items, while 850+ fillpower RDS-certified, PFC-free Ultra-Dry Goose Down delivers reliable thermal performance in extreme cold. The modified Free Flow zip system allows precise temperature regulation across a wide range of conditions.

Features

• 850+ fillpower RDS-certified, PFC-free Ultra-Dry Goose Down insulation with non-PFC DWR treatment

• Recycled 20D nylon shell with PFC-free DWR finish

• Roomy expedition mummy fit — accommodates layered clothing and small gear items

• Free Flow zip system: full-length zipper on one side, half-length zipper on the opposite side for ventilation control

• Technical hood and footbox with draft tubes along zippers to minimize heat loss

• Highly breathable recycled nylon liner for comfort during extended use

Technical Specifications

• Temperature rating: -19°C (comfort) / -29°C (extreme)

• Fill: 850+ fillpower RDS-certified Ultra-Dry Goose Down

• Shell: Recycled 20D Nylon with PFC-free DWR

• Lining: 20D Recycled Nylon

• Shape: Mummy

• Body length: 198 cm

• Shoulder circumference: 170 cm / Hip: 159 cm / Foot: 132 cm

• Weight: 1.645 kg