theory11 — Magic Tricks & the World's Finest Playing Cards

Sanada

Heh, I've got one. For sponge balls and money magic, it's pretty nice. If you get the right color to match your hand, you can make things look as if they really vanished or appeared out of nowhere.

-ThrallMind
 
I myself haven't used one, but at my local magic shop, I saw one there, and the magician that owns it, showed me a routine with it. So overall I think its a pretty nice piece of magic.
 
They're very cool little gimmicks, especially if you use sponge!

I don't use them personally, but in the right instance can be very deceptive. The edges can be covered by the folds of your skin so if it's the right color it's pretty inviz!:)

D.