Helium 600 Sleeping Bag

For backpacking and trekking when nights are cold enough to demand meaningful insulation but pack weight still matters, the Mountain Equipment Helium 600 combines 620 g of 700-fill-power duck down with a lightweight recycled shell and an efficient alpine fit. Its -5°C comfort rating and -11°C comfort-limit rating make it a capable three-season option for colder spring and autumn camps.

Slanted box-wall baffles distribute the down around the body, while the anatomically shaped five-baffle hood, four-baffle footbox and integrated neck collar reduce heat loss around key areas. Alpine Fit 2.0 keeps the bag close enough for thermal efficiency without making it unnecessarily restrictive, and the full-length Gemini baffle helps limit heat loss through the 140 cm left-side zip.

The 20D HELIUM outer and Supersoft 20D lining are both made from 100% recycled polyamide and use a PFC-free durable water-repellent finish. At approximately 1.03 kg with a packed size of 25 × 23 × 20 cm, the Regular Helium 600 balances cold-weather warmth with a manageable load for multi-day hiking, camping and mountain trips.

A waterproof roll-top stuff sack and a separate storage cube are included for transport and longer-term storage.