Quick Overview

The Mont Brindabella Hydronaute is a water resistant, four season bushwalking down sleeping bag.

The Mont Brindabella is featured on our Sleeping Bag Comparison Blog. Read a discussion of this sleeping bag and other comparable options here.

With 30 years experience, Mont knows a thing or two about making sleeping bags. This is shown in innovations like the Radial Arc Baffle System, which allows down to loft higher and spread more evenly around your body for superior warmth and comfort. The new and improved Tapered Rectangular Series are warmer and lighter than ever before and feature DWR treated 785+ loft Duck Down.

The Brindabella Hydronaute XT™ features a waterproof, ultra breathable shell fabric that keeps your sleeping bag safe from condensation and damp.

Also available in an extra large version to fit users up to 200 cm . It also has an extra 10cm internal shoulder circumference and has an extra 100 grams of fill.


  • Filled with DWR 785+ Duck Down
  • Radial Arc Baffle System
  • Differential cut reduces the potential for compression cold spots
  • Toaster foot pocket for air activated heat pack
  • Tuck stitching for increased durability of baffles
  • The foot zipper means you can open it out as a doona in warmer weather and the tapered rectangular shape gives you room to move.
  • No cross block baffle allowing flexible down distribution around base and canopy
  • Over sized 3D draught tube along zip to retain warmth
  • Comes with sil-nylon compression stuff sac and large poly/cotton storage bag
  • Minimum Comfort Temperature -11°C

    Tech Specs


    4 season bushwalking


    Tapered rectangular

    Fill weight

    680 g

    Fill type/loft

    Duck down 785+ loft

    Shell Fabric

    Hydronaute XT™

    Inner Fabric

    15 Denier nylon

    EN13537 Comfort Temperature


    EN13537 Lower Limit Temp


    EN13537 Extreme Temperature


    Dimensions/Max User Height

    185 cm



    Total weight



    Extra Info

    Stuff sack

    Ultralight sil-nylon compression stuff sack


    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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