Price range: $819.95 through $859.95
The Helium 450 is a true 3–4 season ultralight sleeping bag built for hikers who want maximum versatility with minimum weight. At just 850 g, it delivers exceptional warmth‑to‑weight performance using 850+ loft RDS muscovy down, a highly efficient baffle system, and dual‑zip temperature regulation. Ideal for cool‑weather bushwalking, coastal tracks, and sub‑alpine missions down to –7 °C for warm sleepers.
A 10×10 D, 520 TC ultralight nylon shell (26 g/m²) with a hot‑rolled‑cire finish provides durability and prevents down leakage. The DWR loft‑treated down maintains higher loft for longer in damp conditions, ensuring reliable warmth across varied climates.
The Helium 450 is compact, compressible, and designed for hikers who need serious performance without carrying excess grams.
Features
Tapered Rectangular Shape — Wide footbox for natural movement and comfort.
Radial Arc Baffle System — Maximises loft height and thermal efficiency.
Vertical Torso Baffles — Maintain optimal down distribution where warmth matters most.
Differential Cut — Reduces compression and cold spots.
Box‑Walled Baffles — Efficient warmth‑to‑weight construction.
Large Down‑Filled 3D Draft Tube — Retains heat along the full‑length zip.
Contoured Hood — Keeps down evenly distributed around the head.
210D Laminated Anti‑Snag Zip Shield — Improves durability and reduces snagging.
Hydrophobic Epic Thread — Prevents moisture wicking through seams.
Tuck‑Stitched Seams — Increased strength and water resistance.
Full‑Length YKK Side Zip + Foot Zip — Dual sliders for ventilation and easy access.
Compression & Storage Sacks Included — Ultralight siliconised‑nylon Z‑Force compression sack and 50 L storage sack with printed care instructions.
Specifications
Intended Use: Bushwalking / Sub‑Alpine
Season Rating: 3 Season
Women / Cold Sleeper Comfort: –1 °C (30 °F)
Men / Warm Sleeper Comfort: –7 °C (19 °F)
Shell Fabric: 520 TC, 10×10 D ultralight nylon (26 g/m²)
Lining Fabric: 520 TC, 10×10 D ultralight nylon (26 g/m²)
Down Rating: 850+ loft premium RDS muscovy down
Down Treatment: Water‑resistant DWR loft treatment
Packed Size: 15×31 cm
Zip Side: Left or Right (Standard), Left (Women’s & XL)
Zip Configuration: Side + Foot zips, YKK dual sliders
Colour: Orange / Black
Weights
Women’s: 450 g fill / 810 g total
Standard: 450 g fill / 850 g total
XL: 550 g fill / 1000 g total
