In reply to swifty:
I use it to support iffy pulleys in my fingers.
Apparently, preventative taping in this way is a bad thing as it stops the affected part getting stronger. After 30 years of experimentation, my considered view is that preventative taping stops my fingers going 'ping'.
The crucial part is no-stretch tape that really sticks. As far as I am aware, le Strappal is the only one that is both of these things.