Classic Vintage Genuine Cellulose. Feels and sounds like good old fashion real tortoiseshell picks. Material: Cellulose. Made in Japan. Medium 0.50mm.\n\nYour tone starts when your pick hits the string. For 55 years, Pickboy has dedicated itself to crafting picks that help guitarists find their perfect sound. Trusted by legendary artists from Ritchie Blackmore to John Mayer, Pickboy picks are the choice of professionals and aspiring pros alike.