How Do You Reattach a Torn Backpack Strap?

Trim the frayed edges, align a patch of nylon cloth with the torn strap, and sew it on with upholstery nylon thread using the backstitch. The iFixit repair guide lists the repair as moderate in difficulty, taking about 30 to 40 minutes.

What the guide says

• Materials: upholstery nylon thread, about 25 inches for each of two lengths plus a yard for another, and a piece of nylon cloth about 2 by 5 inches.
• Tools: a hand sewing needle and scissors.
• Trim the frayed edges and any loose thread from the backpack and the strap.
• Align the nylon cloth with the torn strap so that it can fold over it.
• Sew across using the backstitch, making sure the stitch goes all the way through the nylon.
• Align the strap with the shoulder of the backpack, hold it in place and backstitch to join them, then trim any loose thread.
• For extra support, repeat the stitching on the other side.

What to do

1. Trim the frayed edges.
2. Cut a patch of nylon and fold it over the strap end.
3. Backstitch through every layer.
4. Reattach the strap to the pack the same way.
5. Check that all the loose ends are trimmed and that the stitching is even.

When to ask a professional

If the pack’s body is torn as well, or the strap is attached to a padded panel, a repair shop with a heavy machine will do a stronger job.

Where this answer stops

This is a community guide, not a maker’s. A hand repair may not match the factory’s strength, so be careful with heavy loads.