I purchased this wristband to help my arm against skin abrasion when playing wearing a tshirt. Now it's more than that. Everytime I know I will be playing a specific time, I wear the pearl to warm my wrist and hand.
Guess what? It works. Not only I noticed my plucking hand warmer it gave me a lot of consistency in my playing.
Don't let it fool you, a simple wristband can help you a lot in your playing.