C-Clamp Sternum Strap Replacement
Zach Mueller and 4 other contributors
Last updated on Feb 11, 2026
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Community-Contributed Guide
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Introduction
Go to step 1 ↓Many Patagonia backpacks feature a removeable sternum strap, also known as a chest strap, designed to alleviate shoulder pressure and distribute weight more evenly across the chest.
This guide demonstrates how to reattach one specific style of Patagonia sternum strap - the c-clamp - named for its C-shaped cross-section. This style was used on some packs produced between 2009 and 2018.
Replacement parts are currently unavailable. To get a new sternum strap, take your pack in to a local Patagonia retail store for repair evaluation or send it in to Patagonia through their mail-in repair service.
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Locate the sternum strap that has come off the pack.
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Replacements for this style of sternum strap are not currently available, so if part or all of the sternum strap is missing, reach out to Patagonia for alternative options.
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The 'c-clamp' piece of the sternum strap fits over a plastic tube or ‘rail’ that is inside the backpack strap. At the bottom of this rail there is a fabric flap.
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Pull back the fabric flap to expose where the rail ends. This is where the c-clamp was designed to be slid on and off.
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At the exposed area at the base of the rail, slide the c-clamp back onto the rail.
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Pull tightly on the fabric flap to expose the area.
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Maneuver as if parallel parking a car. Start at an angle, slide partially onto the rail, and then straighten out.
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Repeat the steps above on the other backpack strap.
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Slide the sternum strap to your desired position.
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Hit the trails with your newly attached sternum strap!
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2 Guide Comments
This is helpful, except where do I find the replacement part! I contacted Patagonia and they no longer make it; they said to try a local sporting goods store or to send to Patagonia and they'll sew on a new daisy-chain version. My local REI does not have these parts either. Bummer!
You can find one on Etsy: https://www.etsy.com/listing/1320149223/...
