Quick Overview

Ultralight three season down sleeping bag, in extra-large size.

The Helium 450 XL is an extra large bag appropriate for a wide range of conditions and temperatures. From coastal ranges to sub alpine areas this XL version of the Helium 450 bag is suitable for temperatures as low as -7ºC or open it out flat and redistribute down in warmer weather. This XL version has 100 grams more down than the standard size. Maximise your pack space with a compact, lightweight and versatile Helium XL sleeping bag. 

The ultimate bushwalking bag for virtually all Victorian conditions.


  • Ultralight 26 gsm nylon outer fabric
  • Radial Arc Baffle System
  • Differential cut
  • Duck down 800+ loft
  • 3D draught tube
  • Minimum Comfort Temperature -7°C

Tech Specs


3 season bushwalking


Tapered rectangular

Fill weight

550 g

Fill type/loft

Duck down DWR 800+ loft

Shell Fabric

10 by 10 denier, 520 thread count, ultralight Nylon (26g/m2)

Inner Fabric

15 denier down proof Nylon

EN13537 Comfort Temperature


EN13537 Lower Limit Temp


EN13537 Extreme Temperature


Max User Height

200 cm

Total weight


Extra Info

Stuff sacks

Ultralight sil-nylon stuff sack, large storage bag also included


Tuck stitched, radial arc, box wall


Full length + foot

COVID Update Sept 2021: Aus Post is having major delays across the network.

Standard/Free shipping to major capitals takes 2-5 business days.

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

Choose Express Post for priority packing and faster shipping.

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