Step 1: Tools and Materials
Denim sewing needle for sewing machine
Needle for hand sewing
Polyester outdoor thread
Strap or rope
Step 2: Size and cut
Put the pants on a flat surface.
Place the longest tool you'll be storing in the bag, on the pants leg.
Add length for the tie strap and the fold that will cover it.
Cut the pants leg where you have determined.
For an extra strong bag cut the same piece from the other leg.
(This tutorial will assume the bag is double lined. The pants I have were worn thin in places and the tools I want to keep in the bag are heavy.)
Step 3: Attach the pieces together
Slide one of the cut pieces inside of the other, place the 'visible' sides next to each other. When finished; one visible side will be the outside of the bag and the other will be on the inside.
Be sure to offset the seams that run down the length of the pants leg.
Decide which end will be the top of the bag.
Sew the two pieces together at the top end. Follow the circumference of the pants leg.
Invert the pieces so the correct side of the material is now showing.