Mont Helium 450 XL LHZ Vertical Baffles Sleeping Bag

A 3 to 4 season ultralight sleeping bag designed for minimum weight (only 850g!) & maximum versatility, the Helium 450 has proven popular with hikers in a range of climates from coastal walks to sub alpine elevations. The 450 allows temperature regulation with dual zippers & offers incredible warmth-to-weight thanks to 800+ loft down. Maximise your pack space with a compact, lightweight and versatile Helium 450 sleeping bag.

Ultralight shell fabric and high-loft RDS 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 RDS white down fill with DWR Loft treatment adds greater resilience, higher loft and better warmth in damp conditions.
Tapered rectangular shape with a wide foot section for room to move
Radial Arc Baffle System on horizontal baffles maximises 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 heatÂ
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 & foot zip
Includes ultralight siliconised-Nylon Z-Force Mechanical Advantage Compression Stuff Sack & 50L polyester storage sack with printed care & washing instructions