First, you'll want to cut your t-shirt material into strips. My strips were about 16 inches long and approximately 1 inch wide. The material will stretch as well, making them considerably longer.
To create a simple single colored bangle, first, stretch the material out, tie the t-shirt strip in a loose knot around the bracelet.
Wrap the material tightly around the bangle. If you run out of material before you get to the end, simply hot glue another strip to the end of your current strip and continue.
When you arch the end, untie the first knot and tie the two loose ends together. Tie them tight and position the knot on the inside of the bangle, cut the ends and secure with some white craft glue.
To make braided bracelets, gather SIX strips of material, 2 of each color you wish to use. It's best to choose contrasting colors. I used four tie-dyed strips and two white strips for one bracelet, and for the other I used two each gray, tie-dye, and pink.
Use a hot glue gun to attach two matching strips, end to end to make one long strip. Repeat for the others. Stretch out the material, taking care not to pull them apart where they are glued. Tie the three strips together in a loop knot, leaving a couple of inches above the knot.
Braid the strips together. When you get to the end, wrap in a rubber band or tie with some scrap fabric (only temporary). Wrap the braid tightly around the bangle. When you reach the end, loosen the knots on both ends and tie together. Secure the knot with white craft glue. Trim the fringed ends to a length that you like.