If you are an experienced backcountry camper or ski tourer who is looking for a super lightweight bag, the Mont Helium 680 down boxfoot sleeping bag is an ideal choice.

The Helium 680 is the warmest model in the Helium series suitable for temperatures as low as -12°C. Ideally suited to cold weather and four-season camping including use above the snowline. Ultralight shell fabric and high-loft down fill on the Helium bags mean higher performance for less weight. Durable 10 by 10 denier, 520 thread count Nylon weighing only 26g/m2 with a hot-rolled-cire treatment to prevent down leakage and increase durability. Premium 800+ loft white down fill with DWR Loft treatment adds greater resilience, higher loft and better warmth in damp conditions.

While the Helium 680 is rated to -12ºC, it is for the experienced alpinist. If you are a cold sleeper or just starting your alpine journey then you may wish to consider the Brindabella XT.

Features

• Mummy shape with boxfoot for maximum efficiency
• Radial Arc Baffle System maximises baffle loft height & warmth
• Vertical baffles on torso maintain optimal down distribution
• Differential cut reduces compression & cold spots
• Box walled baffles for warmth & weight efficiency
• Large down-filled 3D draft tube along zip retains heat
• Contoured hood keeps down evenly distributed around head
• Laminated 210 denier Nylon anti-snag shield along zips
• Sewn with hydrophobic Epic thread to prevent moisture from wicking along seams and inside the shell
• Tuck stitched for seam strength & greater water resistance
• Full length YKK side zip with dual sliders
• Includes ultralight siliconised-Nylon Z-Force Mechanical Advantage Compression Stuff Sack & 50L polyester storage sack with printed care & washing instructions