When I wore a full leg cast once, I couldn't get my undies over the cast. I didn't care to wear men's boxers or resort to adult diapers, so I exercised my noodle and adapted my own undies.
I bought a package of cotton undies and opened the side seam on each. I attached Velcro to the open side with Stitch Witchery. I could have sewn the Velcro on, but at the time I needed a shortcut in work effort more than I needed to save the $1 for the Stitch Witchery.
Hope that this tip helps somebody.
