Cut out pieces of webbing in adequate lengths. Run a lighter flame gently over the edges of the webbing to seal off any threads or unraveling fabric.
Thread your webbing through a D-ring, O ring or square ring.
Hold the sides of the webbing together. Sew the short piece to the long piece by sewing an “X” shape through both sides.
Thread another short piece of the strap through a tri-glide. Fold the short piece hanging out of the tri-glide and sew to the two new sides together.
Thread the long piece from the D-ring through the tri-glide. You should now have a long adjustable strap and two shorter loops to attach to your backpack.
Place one of the loops against the upper side of your backpack, just above where your shoulder should go. Sew it together. Repeat the process on the other end of your backpack.
Repeat this entire process to create the second strap for your backpack.