Aarn Effortless Rhythm
Aarn Effortless Rhythm
Aarn Effortless Rhythm

Aarn Effortless Rhythm

Regular price $589.00 Sale price$529.95 Save $59.05
Tax included. Shipping calculated at checkout.

Size chart

Back Length

Back length - CM 39-41 42-44 45-47 48-50 51-53 54-56 57
Back length - IN 15-16 16-17 17-18 18-19 20 21-22 22
Little Llama 20 O/S O/S O/S
Active Endeavour 26 O/S O/S
Back Favour 28 O/S O/S
Natural Exhilaration S S or L L L L L
Pace Magic 30 O/S O/S O/S O/S O/S O/S
Pace Magic 40 O/S O/S O/S O/S O/S
Mountain Magic Pro 50 S S or L S or L S or L S or L S or L
Featherlite Freedom S S or M S or M M M
Featherlite Freedom Pro S S or M S or M M M
Peak Aspiration S S or M S or M M M or L M or L L
Natural Balance Pro L L L
Effortless Rhythm M M M M or L M or L L

Hipbelt Size

Hipbelt Small Medium Large Extra Large
CM 64 - 80 81 - 90 91 -100 101 - 120
Back Length

The Aarn Effortless Rhythm is a dual-compartment Aarn backpack, designed to take your gear into the world's most remote places comfortably.  Perfect for multi day back country trips or long-distance thru-hiking trails or just extra space for extra creature comforts.  

With a separate compartment at the bottom, it makes it easy to store and find gear. The lid is removable and can also be converted into a bum bag.

Choose the specific Balance Pockets that suit your activity and volume requirements. The Stronglites have proven themselves in the roughest back country and on the world's highest mountains.


  • Removable Lid pocket converts into a bum bag.
  • Bladder hydration compatible.
  • 2 Water-resistant dry liners, one for each compartment.
  • Web front compression + Loc-Loops to secure vertical tools.
  • Twin trekking pole attachment in front or behind.
  • Twin ice axe attachment.
  • Built-in attachments for skis, crampons, shovel, snowboard, helmet.
  • Pack-raft compatible.


  • Dimensions (cm) :
    • W 40cm x D 25cm x H 75cm (M) / 85cm (L).
    • W 15.7in x D 9.8in x H 29.5in (M) / 33.5in (L).
  • Volume (litres): 66 (small) \ 72 (large).
  • Weight: M 1446 grams + liners L 1506 grams + liners.
  • Load (kg): 22 (Increase by using Balancing systems).
  • Removable waterproof liners included.
  • Aarn Balance Pockets: Optional extra.

Pelvic-Form hipbelt:

  • 4 sizes: S, M, L, XL.
  • Length and angle micro adjustable to allow a perfect match to your pelvic size and shape.
  • Dual-adjust hipbelt tensioning allows fine-tuning of the hipbelt shape.
  • Hipbelt moves with you with U Flow pivot and interlinked side stabilisers.

Shoulder harness:

  • 2 sizes: S, L.
  • Adjustable back-length.
  • On-Adjust buckle allows back-length shortening with the pack on to allow a precision fit to a wide range of body sizes.
  • Breathable stretch 3D mesh that auto-moulds to the slope of your shoulders.
  • Flow-Thru stabilisers prevent shoulder straps distortion when top stabilisers are tightened.
  • U Flow by interlinked bottom tensioners.

* This item is subject to an additional Bulky Item shipping charge which is added at checkout. Please see our Shipping Policy for further information. 

The standard local delivery time from our store in Melbourne for orders placed before noon is 2–7 business days via Australia Post standard delivery. Express Post is also available. Please see our Shipping page for more details. International Orders are subject to flight availability.

If you'd like to know availability and delivery times for a specific item please contact us and we will get back to you asap.

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About Aarn

Aarn Packs represent the most efficient, comfortable, stable, practical and healthiest way to carry load on the human body.

They challenge traditional thinking on pack design.

Aarn Packs was born in Aotearoa New Zealand, Mother Nature’s playground, where spending time in the mountains and on the trails is a way of life.

The founders Aarn and Devi Tate set out to challenge traditional back pack design thinking. They spent years researching, innovating, and developing new design principles to create a pack that didn’t alter posture, balance and movement.

Aarn Packs and Balance Pockets are designed here in Christchurch, New Zealand, and are available throughout the world. Aarn's design principles stay the same to this day, with a focus on posture, balance, movement, fit, lightness and using science to improve your comfort and health.

Aarn embrace the philosophy of the Cradle to Cradle method and keep sustainability in mind with their design and manufacturing processes.

Aarn Packs continues to be an industry leader in the outdoor adventure scene. We’re proud to have received accolades and awards from DuPont, Trail Kauftipp, Editors Choice at Outdoor, Outdoor Gold Winner, Gear Guide Innovation Awards, and ISPO Brand New Award.

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