Imagine a frisbee that flies with ease, is made from eco-friendly materials, and is safe to throw indoors! The PHD Flying Disk has many names like "perfectly harmless device", "prevents home destruction" and "promotes hand dexterity" due to its genius design. All discs are made out of 100% cotton, hand dyed, crocheted and are fairly-traded. By getting a Flying disk, you are helping women in Guatemala make a living wage. PHD disks also come in a Sunburst style. PHD disks come available in two types :Classic and Sport Classic disks are easier to throw, lighter weight and ideal for indoors while Sport disks are heavier, 100% colorfast and fly farther for playing outdoors.