Transform instantly from lifestyle sunglass to versatile performance-specific gear by quickly adding or removing the Switch® Lock and Load™ magnetic eyecups that best suit your environment or outdoor pursuit: The Stormrider high-performance prescription sunglasses feature a unisex 6 base lens curvature and narrower rectangular eye shape. Lightweight and impact-resistant injected nylon construction, increased lens retention, flexible temple construction and an adjustable strap are designed for head hugging performance and helmet-friendly comfort.