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.
Step 4: Sew the Bottom Circumference of the Bag
Step 5: Make a Hole for the Pull String
Place an eyelet through both layers of material at that point you have determined. Be sure to use an eyelet large enough for your strap or rope. Instructions on how to make an eyelet out of material can be found in this instructable. https://www.instructables.com/id/Reinforced-fabric-hole-Old-style-button-hole-or-ey/
I made my eyelet using another piece of material from the jeans.
Step 6: Create Pull String Channel
You may need to sew by hand where the seams are located.
Step 7: Measure and Cut the Bottom for the Bag
Draw around the circumference of the bag. Draw your circle larger than the bottom of the bag.
Cut two identical pieces of material for the bottom.
Step 8: Pin and Sew the Bottom
Sew the bottom of the bag to the sides. Use multiple passes. I used 3 sew lines.
Turn the bag right side out.
Step 9: Add the Cinch Cord / Handle
Open the top of your bag.
Wrap your strap or rope around the top and leave extra for a hand hold.
Also leave about 2 or 3 inches extra for hemming the ends and attaching the strap to itself.
If your strap material is the type that melts, seal the ends with a lighter so they do not fray.
Fold over a little bit on one end of the strap and sew it down.
Do the same on the other end, except this time, fold the end in the opposite direction. If you had the strap flat on a table for instance, one end would be folder under and one end folder over.
Attach the strap to something to help feed it through the strap channel. A safety pin or paper clip usually works well.
Pull the strap through the channel.
Remove the safety pin or whatever you used.
Sew the strap to itself. Here is where the folded ends come into play. When you put the ends of the strap together the folded ends should be between the two straps. When everything is sewn together it will be like the ends are tucked into the sewn area.
Sew a double square and X pattern. (Two squares side by side with an X in each of them)
Step 10: Use the Bag
Pictured are some other sacks I have made. The dark blue sacks are made in the same way except a single layer of material was used. The sacks that are standing upright have a 'cup' inside of them which is made from cardboard and duct tape. This is to protect the material from sharp edges. The round, 'tap and die bag' opens up flat to access it's contents. Instructions on how to make that can be found at https://www.instructables.com/id/Sack-that-opens-flat/ The green bag is made the same as the 'tap and die bag'.