Things You'll Need
Instructions
Cut off the sleeves and bottom hem of the T-shirt. Cut off the top of the shirt in a straight line directly underneath the collar.
Turn the shirt inside out and sew the arm holes and the bottom of the shirt closed.
Hem the top of the shirt 1 inch, leaving a 1-inch opening in the middle of one of the sides.
Cut a piece of drawstring that is 75 inches long. Thread the drawstring through the hem of the top of the backpack, using the 1-inch opening.
Sew the ends of the drawstring to either bottom corner of the backpack. Turn the backpack right side out and tug on the drawstring to close it.