Effortless Rhythm is the dual compartment model in the Stronglite family, which is designed to take your gear into the world’s remotest places comfortably and reliably. It’s tough, dynamic, multi-functional and highly water-resistant. Fully featured, it allows you to carry a wide variety of adventure tools for diverse conditions and multiple activities. Add Balance Pockets for natural balance, pain relief and load-carrying efficiency. Choose the specific Balance Pockets, Bags or Racks that match your activity and volume requirements. The Stronglites have proven themselves in the roughest backcountry and on the world’s highest mountains.

  • Hydration exit and attachment loop
  • 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

Flow Frame

  • 2 backlengths
  • Suspended backpanel
  • On-Adjust backlength

Pelvic Form Hipbelt

  • 4 sizes
  • 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
  • Optional Balance Pockets

Shoulder Harness

  • 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
  • Twin stabiliser take-off options with 5cm height difference for a precision fit
  • Flow-Thru stabilisers prevent shoulder straps distortion when top stabilisers are tightened
  • U Flow by interlinked bottom tensioners


  • Dimensions: 75cm x 40cm x 25cm (medium) / 85cm x 40cm x 25cm (long)
  • Capacity: 66L (medium) / 72L (long)
  • Load Rating: 22kg

Weight (including liners):

  • Medium: 1.58kg
  • Long: 1.67kg

Size Guide:

Back Length:

  • Medium: 43cm – 53cm
  • Long: 53cm – 57cm


  • Small: 64cm – 80cm
  • Medium: 81cm – 90cm
  • Large: 91cm – 100cm
  • XL: 101cm – 120cm