Effortless Rhythm Long 72L Pack

Size:Medium hip belt

Effortless Rhythm is the dual-compartment model in the Stronglite family, which is designed to take your gear into the world's most remote places comfortably and reliably.

With a separate compartment at the bottom, it makes it easy to store and find gear. The lid is removable and can be converted to a bum bag (fanny pack). Most often used for hiking, when you like to take a bigger load.  This is the Long version


  • 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
Size Guide

To determine which size is best, you need to determine your backlength: the distance from the top of your hip bones to the mid- point of your shoulder (where the shoulder strap goes over the shoulder). One way to do this accurately is to stand with your back against a wall with a hard covered book and pencil in hand. Place the book vertically against your side with the bottom edge of the book resting on top of your hipbone and the back edge against the wall.

Mark the height of the lower edge of the book on the wall. This is the height of the top of your hips. Now place the book vertically by the side of your head, with the back edge resting against the wall and the bottom edge resting on the mid-point of one shoulder (half way between your neck and the end of your shoulder - this is where the center of the shoulder straps should lie). Mark the height of the bottom edge of the book on the wall. This is the height of your shoulders. Now measure the difference in height between the 2 marks on the wall - this is your backlength.

If it is 38 cm or less, you need a short backlength; if it is more than 38 cm, you need a long backlength. 

The large models with Pelvic-Form Hipbelts have 3 hipbelt sizes. The medium size, M is standard. To decide whether this will fit, or whether you need a S or L size, use a tape measure to determine your waist size, as the top of the hip belt goes around your waist. If this distance is less than 85 cm choose the S size, if it is greater than 95 cm, choose the L size. Between 85 cm and 95 cm, choose the M size. 

Item   Aarn Peak Effortless Rhythm
Best Use   Multi-Day Hikes; Expeditions
Weight   1900g (Medium); 2000g (Long)
Fabric   Body - 500D Kodura Nylon & 210D Ripstop Nylon; Base - 210D Gridstop Dyneema; Liner - 190T Nylon
Size   50L (Short); 55L (Medium); 60L (Long)
Features   Natural Posture Load Carrying; Lightweight Materials; Waterproof Dri-Liner; Hydration Port in Lid Pocket; Front & Side Stretch Pockets; Cord-Loc Compression; Equipment Attachment Points; Removable Hip Pack Lid 
Harness Style   Matrix Mesh Panel; U-Flow Straps; Custom-Fit Hip Belt; True-Fit Shoulder Straps; 3D Flow Frame

Shipping Information

Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.

About Us

Who we are

"Established in 1968 as Southern Cross Equipment, we are now a member of a retail company called The Outdoor Life Group. Private ownership provides us with the freedom to choose our own business path. We have therefore developed a retailing concept that excites us, and which we hope will inspire you.

Trek & Travel combines the best outdoor products from around the world with very experienced staff who all share a passion for travel and adventure. This passion for the wilderness, cultures and heritage of the planet keeps us actively seeking new places to explore.

We hope that you find us both welcoming and knowledgeable, and always willing to help you plan your next adventure."


Sample Facebook Testimonials

Amanda Warriner - 5★ "I spent close to 3 hours in this store today, being fitted for and choosing a pack, and the staff are fantastic. Helpful, knowledgeable, patient and friendly - and I think I'm probably a fussy customer and I have difficulty finding packs that fit comfortably. Has to be my best experience in this kind of store to date."

Tom Brickhill - 5★ "My favourite outdoor shop in Sydney. This is where you go if you want to see gear stocked because of it's quality, not just because it's corporate overload has pumped out another 10,000 puffer jackets that need to be moved before next season. Knowledgeable staff that actually partake in trekking and travelling themselves. Definitely worth dropping in!"

Adam Jude Baus - 5★ "Always friendly, helpful staff with great knowledge. Great range of good quality products (nothing really low end) including Australian/NZ brands e.g. Wilderness Equipment, One Planet and Aarn. Never had a fuss with exchanging unused gear within the 2 week period."

Questions & Answers

Have a Question?

Be the first to ask a question about this.

Ask a Question

You may also like