The Navigator Alpha tips are made with 10 layers of Japanese Pigskin leather that are bonded, and then compressed for 3 minutes. The result is a tip that provides a firm crip hit that mushrooms less than it’s competitors. The base layers of the Alpha have a different density, which allows them to provide a cushion. This will help reduce pressure on the tip and also protect the ferrule. These are available in Super Soft, Soft, Medium and Hard. Sold individually.