Quick Overview

If super lightweight walking or ski touring is the thing for you then the Mont Helium 600 down sleeping bag is an ideal choice. Impressively light, surprisingly compact and exceptionally warm by way of 800+ loft down.

The Mont Helium 600 is suitable for temperatures as low as -10°C and still only weighs 1kg! 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 600 is rated to -10ºC, it is not appropriate for alpine snow camping unless you're an experienced alpinist.


  • Tapered rectangular shape with a wide foot section for room to move
  • Vertical baffles on torso maintain optimal down distribution
  • Radial Arc Baffle System on horizontal baffles maximises loft height & warmth
  • 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 & foot zip
  • Includes ultralight siliconised-Nylon Z-Force Mechanical Advantage Compression Stuff Sack & 50L polyester storage sack with printed care & washing instructions

Technical Specifications

  • Size: Standard
  • Weight: 600g fill, 1000g total
  • Maximum user height: 185cm
  • Intended use: Bushwalking/Alpine
  • Season Rating: 3 to 4 Season
  • Women &/or Cold Sleeper: -4°C
  • Men &/or Warm Sleeper: -10°C
  • Shell fabric: 520 thread count, 10 by 10D ultralight Nylon (26g/m2)
  • Lining fabric: 520 thread count, 10 by 10D ultralight Nylon (26g/m2)
  • Packed size: 16 x 33cm (Can be compressed smaller using compression sack)
  • Down rating: 800+ loft premium RDS white duck down
  • Down treatment: Water resistant DWR Loft treatment
  • Zip side: Left or Right
  • Zip configuration: Side & Foot zips. YKK brand zips, dual sliders on side zip

Standard/Free shipping to major capitals takes 2-5 business days (after dispatch), with occasional delays.

Order before 11am - we usually ship the same business day!

Choose Express Post for priority packing and faster shipping.