I have made a lot of these and was asked to make a tutorial, so here it is! Unlike other fabric bangles, these are completely soft and flexible as they don't use other bracelets underneath. Forgive the bad picture quality, all the pictures are from my phone.
If you want to embellish these, you can sew buttons onto them or weave in yarns and threads.
Make a small cut at the end of your fabric. You'll want your fabric to be between 36 and 44 inches wide to make a comfortable size of bangle that you can slip on and off.
If you like the look of rough edges, tear your fabric strips by hand. For soft, thin fabrics, make your strips about an inch wide. For thicker fabrics, tear strips a half an inch wide.
If you don't want frayed edges, cut your strips with scissors; however you will end up with fringey threads either way--more fringe will be visible when you tear by hand.
Grab your crochet hook. I use a 5.5mm/size I hook for my 1 inch wide soft fabrics. The thicker and wider your strip is, the larger hook you'll need.
Start, of course, with a slip knot around your hook. Leave a 3 inch tail.
Start a chain stitch and continue until you only have about 3 and a half inches of fabric left.
Make a loop using your last stitch. Thread the end of your fabric through to create a knot that won't unravel.
Tie your two fabric ends together in a tight knot, making sure to keep your chain from twisting. When you keep it flat and even, the bangle will form a better circular shape.
To make sure your knot stays, continually tug on the bracelet and keep pulling the knot tighter.
Snip the ends off. An optional thing to do is reinforce your knot with fray check, though it won't make a difference if your knot is really good and tight.
Now, make more, because you know you want to! :)