These interchangeable, detachable shoulder straps can be attached to all Zpacks backpacks made in late 2024 or later. Just make sure your old straps have clips at the top if retrofitting an existing pack.

These straps include a sternum strap, a pair of tiny oval carabiners to attach them, and a pair of 20" (51 cm) x 1/2" webbing that connects the bottom of the straps to your backpack. Load lifter webbing is also included, and is detachable and not needed with our frameless backpacks.

Vest straps also include a second sternum strap and a second set of 20" (51 cm) x 1/2" webbing w/ D rings which should be looped-on near the corners of your pack.

This belt is is compatible with our Bagger and Nero Backpacks.

Made with 1" (2.5 cm) webbing that is approximately 24" (61 cm) long on each side. The webbing can be trimmed if desired.

Remove the belt buckle, slide the webbing through the loops on your backpack until tight, then replace the belt buckle.

Zpacks custom-designed Tiny Oval Carabiners are the smallest, lightest, functional ultralight carabiners in existence. Weighing in at a minuscule 1.5 grams each, these carabiners are specifically designed to fit well on 1/2" or 3/4" webbing to conveniently clip to any backpack.

They are good for clipping small items to your backpack, or securing your pocket knife, keys, or wallet to a belt loop.

We also use them to lock in our interchangeable Shoulder Straps on all our backpacks. Also available as an S style carabiner.

This is a replacement for the Lycra Back Panel that currently ships with all Arc style backpacks. It creates a trampoline with an air gap against the wearer's back. It is also compatible with all older Arc backpacks as a retrofit.

The Lycra mesh is soft and stretchy and feels good on the wearer's back.

We also have our original style Mesh Back Panels which are made with pocket mesh. Some customers prefer the original style mesh because it is more firm, and has better airflow. Either style are interchangeable on all old or new Arc backpacks.

This is our original style Mesh Back Panel. It is used to add tension to our Arc style backpack frames, and to help maintain a gap for air flow against your back.

This will fit all Arc style backpacks, and can be retrofitted on old or new packs. It is made form our 3.5 oz/sqyd (119 g/m²) pocket mesh. The holes are a little larger than 1/8" (about 4 mm) and they allow very good airflow.

This mesh doesn't stretch as much as the Lycra Back Panels that are currently shipped on all Arc packs. Some customers prefer the more firm pocket mesh, and increased airflow compared to Lycra. Other customers prefer the more soft and stretchy Lycra that is now our default.

This is a replacement for the standard sternum strap that attaches to the daisy chains on our backpack straps.

The sternum strap loops around the daisy chain webbing on our shoulder straps, and should also be compatible with other similar shoulder straps.

The maximum length is about 12" (30.5 cm) from strap to strap and will fit most hikers.

We also have a longer sternum strap available.

This is a longer version of the standard sternum strap that ships with our backpacks. The webbing is 5" longer and adjusts to a maximum of about 17" (43 cm) from strap to strap.

The sternum strap loops around the daisy chain webbing on our shoulder straps, and should be compatible with other similar shoulder straps.

This did exactly what it was supposed to. Good quality.

– Jake D., ★★★★★

This webbing is about 1/2" (12 mm) wide and can be used to replace the shoulder strap webbing, load lifters, sternum strap, top strap, or roll top straps on all our backpacks.

Just trim it down to the size you need and singe it with a lighter.

These high quality buckles have a slim profile but are much stronger than the generic half inch (10 mm) buckles you may find elsewhere. They can handle being tensioned down tight so they are great for gear customization. We use them on our backpack's top strap and sternum strap. The male side adjusts, and the female side does not.

These buckles have a wide mouth and narrow prongs so they are easier to snap together.

This replacement horizontal flat stay fits our Arc Haul Ultra, Arc Zip Ultra, and discontinued Arc Blast, Arc Zip, Arc Haul, Arc Haul Zip, Arc Scout, Arc Haul Scout, Arc Air and Arc Air Zip Backpacks.

These replacement pre-curved vertical stays fit our Arc Haul Ultra, Arc Zip Ultra, and discontinued Arc Air and Arc Air Zip Backpacks.

You may also want to replace your Stay Holster Inserts. Instructions for installing inserts and frame pieces are on the Stay Holster Inserts page.

These replacement pre-curved vertical stays fit our Arc Haul Ultra, Arc Zip Ultra, and discontinued Arc Air and Arc Air Zip Backpacks.

These replacement pre-curved vertical stays fit our Arc Haul Ultra, Arc Zip Ultra, and discontinued Arc Air and Arc Air Zip Backpacks.

You may also want to replace your Stay Holster Inserts. Instructions for installing inserts and frame pieces are on the Stay Holster Inserts page.

These replacement round vertical stays fit our discontinued Arc Blast, Arc Zip, Arc Haul, and Arc Haul Zip Backpacks. If you prefer our original adjustable Arc stay system, these can be retrofitted into any of our new Arc Haul Ultra backpacks. You may need to trim down the length with a hacksaw to get the right fit.

These replacement round vertical stays fit our discontinued Arc Blast, Arc Zip, Arc Haul, and Arc Haul Zip Backpacks. If you prefer our original adjustable Arc stay system, these can be retrofitted into any of our new Arc Haul Ultra backpacks. You may need to trim down the length with a hacksaw to get the right fit.

These replacement round vertical stays fit our discontinued Arc Blast, Arc Zip, Arc Haul, and Arc Haul Zip Backpacks. If you prefer our original adjustable Arc stay system, these can be retrofitted into any of our new Arc Haul Ultra backpacks. You may need to trim down the length with a hacksaw to get the right fit.

Our vertical carbon fiber Arc Frame connects to the backpack by sliding into webbing pockets at the top and bottom of the backpack.

The pockets each contain a "stay holster insert" which covers the ends of stay to help prevent them from punching through the pockets. The inserts have metal sandwiched inside of them making them difficult to wear through.

The inserts are replaceable, and should be checked after 500-1,000 miles, especially if starting a long hike with a used pack.

Instructions:

1. Remove the three horizontal frame bars by pulling from the center until the end pops out. They flex easily and come in and out easily.


2. The vertical stays are difficult to remove. Pull up on the stay pocket, and pull down hard on the stay until the top end slips out of the pocket.


3. If the old inserts did not come out with the stay, slide something skinny (like a tent stake, or a horizontal stay) through the flaps and pull them out.


4. Replace the stay inserts if they are worn or punctured. Make sure the stay is between the two flaps on the inserts and is fully in place at the bottom and top.


5. Put the bottom of the vertical stay in first. Use one of the horizontal stays like a shoe-horn to pry/guide the top back into the upper pocket. It should go in without too much fuss.


6. Flex the three horizontal stays back into place. They should be behind the vertical stays.