Oakley - Stunt Devil A - Matte Black/Prizm Road Polar Loop Instinct E tracks your heart

Instinct E tracks your heart rate

Designed for use with HERO13 Black

Adjustable temples and nose pad make sure you’re always comfortable

LIGHTWEIGHT AND DURABLE - Manufactuered with BiO-Matter™ frame material made from bio-materials having at least 56% bio-based carbon content (representing ratio of castor oil to fossil sources)

Oakley - Stunt Devil A - Matte Black/Prizm Road Polar Loop Instinct E tracks your heartEngineered for every face that dares to go further. Now with an Asia Fit design, it adapts to more shapes and features, giving you a secure, stay put feel. All grip, all comfort, and no limits. Features Hyper Grip Technology: Oakley Hyper Grip utilizes flexible ear socks for maximum comfort and retention, offering a more secure fit while distributing weight evenly for a lightweight feel, even during the most intense activities Unobtainium Nosepad: