Not too much to say, it's made out of foam, made to slip between the strings, made to hold two picks.  I have several of these, for acoustics and for electrics.  My son lost one before during a performance on stage so it is not that secure that it won't be dislodged, still, it does stay on majority of the time.  I do recommend this.  My son's guitar teacher calls this a "fancy little pick holder" and I've had people ask where to buy one when they see it for the first time.  One must also be careful, my son lost one of these so I know it is a possibility of it falling off.  He lost it after performing in a play on stage.