Leave nothing to chance. Vision is easy to fit to your needs. Without the Jawbone mounted on the morning run to enjoy the nature with maximal field of view. And with Jawbone mounted during the bumpy mountain bike ride of the afternoon. Vision is carefully designed to suit different types of faces. The temples are made with wire core that can be adjusted for optimal fit. The nose pad is adjustable to make the glasses as comfortable as possible to wear. The lens is detachable and can easily be switched to different lens colors and filter categories (can be purchased separately). The optical adapter (purchased separately) can be taken to adjust it to your personal eyeglass’s prescription. Vision is the ultimate adjustment for the ultimate performance.