Set of two. The lightweight fabric makes it the perfect piece for layering under summer jerseys or multiple winter garments. The Dri-Release Base Layer dries 4x faster than cotton. This means the fabric moves moisture from your skin to the outside faster to keep you cooler making it one of the most versatile base layer options. This particular base layer has been in the Giordana collection longer than any other and for good reason. It does its job well, holds up over continues usage, and is the definition of simplistic utilitarian design allowing it to have a value driven price point for the performance it provides. Made in USA.