Locate and assess the damage.

If possible, stitch the tear closed. This will seal the tear on the inside of the patch so it doesn't grow bigger or get caught while the garment is being worn. See Whip Stitch on a Tear.

If the tear is too large or oddly shaped to be stitched closed, see the final step in this guide for details on creating an underpatch.

If you're repairing Patagonia Quandary Pants with a repair patch included, move on to the next step. Otherwise, see Make a Fabric Patch for guidance and best practices on making a fabric patch.