We're the parents of a profoundly deaf little girl who received bilateral implants of Nucleus 5 in February 2011 at age one. She is doing wonderfully with her cochlear implants. For the first few months we struggled with finding a good solution to keeping the processors on and after buying many versions of bands and pilot hats online, finally created our own for our daughter. These thin jersey or nylon headbands stay on more securely and comfortably than body tape and snugfit hooks.
These are headbands with different widths of elastic (front and back pictures).
You can see the front and back of each headband. The brown headband has a skinny and wide elastic. The purple one uses both skinny elastic. With the purple headband you can see that I continued the elastic across the back to save myself time finishing the elastic, and also to provide more support. It's simply a personal preference. By purchasing the headbands pre-made that saves me time, and I only need to sew the elastic loops on by hand or machine.