Tortoise Shell has been the "Holy Grail" of guitar picks. Pick manufacturers have worked on the challenge of making picks which are legal and non-lethal to life forms, and which get the same sound. John Pearse's wonderful Studio Picks taught people that a pick could be redesigned...and has 3 different picking points,each of which gets a different sound! So, after using Casein [a resin made from Milk and Phosphoric Acid] for our Faux Tortoise Shell Pins, it wasn't much of a stretch of the imagination to think about doing the Studio™ Picks in Casein. The NEW John Pearse® FAST TURTLES™ are so named in honor of all the tortoises who got away safely! They are available in 4 different gauges of THIN [1.2 mm], MEDIUM [2.5 mm with Dimple], HEAVY [3.1mm with Dimple] EXTRA HEAVY [4 mm with Dimple]. They also come with a complimentary cloth pouch so that they won't get left in your pockets and go through the washing machine. John Pearse® FAST TURTLES™