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Here's what other sites are saying:
The Mountain Equipment Helium 600 is low in weight and warm enough for early Spring and late Autumn use at higher altitudes or Northern latitudes.
- CampSaver.com refers to the men's version
Mountain Equipment made the Helium 600 14 Down Sleeping Bag superlight and highly compressible for backpackers. The Helium truly lives up to its name, with lightweight 725-fill down insulation and an ultralight Helium shell that compresses for compact storage. A slanted baffle construction assists with compression and keeps the down in place to prevent cold spots. An alpine mummy fit offers a little more room for extra comfort. Inside the Helium, you get a Supersoft 20 lining to keep you cozy throughout the night. Like the bag, the DC5 hood's baffled construction keeps the down in place for a cushy head-space. Mountain Equipment also added a roomy Trapezium 4 footbox, a draft-blocking Solus collar, and draft tubes down the side zipper.
- Backcountry.com refers to the men's version
Features of the Mountain Equipment Helium 600 Sleeping Bag Alpine Fit with tapered lower leg for improved thermal efficiency and weight reduction Trapezium 4: 4 baffle trapezoid foot piece with Bull-Eye Technology for down control and low weight DC5 Hood 5 baffles and anatomical Fit provide High levels of warmth and down control with low weight Solus Collar For optimum lightweight Insulation with down draft tubes Slanted Box Wall Construction Offers a stable and superlight structure with excellent stability and down control 30g baffle walls for down control and structure 3/4 length side zip with anti-snag baffle Supplied with lightweight stuff sack and mesh storage sack
- Moosejaw refers to the men's version
The Helium 600 down sleeping bag by Mountain Equipment showcases 50 years of experience in making down bags. They understand the needs of climbers and backpackers and it shows.
- REI refers to the men's version
Why waste precious space in your pack with unnecessary materials. The Helium 600 +14 Down Sleeping Bag from Mountain Equipment is highly compressible and will leave you with plenty of room to spare. Ultralight fabrics and box baffles filled with 725 fill down significantly reduce the overall weight of the bag while giving you top of the line comfort. The anatomically shaped foot box with a 4 baffle end allows your feet to rest comfortably without compressing the down so you stay warmer. A shaped hood and neck collar ensure that you retain as much heat as possible so you get a good night's sleep.
- Mountain Gear refers to the men's version