Bolle Fusion Lexington Sunglasses The unique shapes on our metal frame sunglasses result in highly precise frames and design. Adjustable wire-core temple tips help increase comfort by letting you customize your fit. Integrated spring hinges are designed to exacting standards, giving you just the right amount of tension on your temples for a secure, comfortable fit. All purpose Grey Lens. Neutral Fit: Medium/Large Lightweight, premium-grade resin that's 20 times more impact resistant than glass-and three times lighter