The Black Flys Sonic Fly Sunglasses feature impact-resistant injected nylon frames constructed around a wire core for lightweight comfort and durability.   This also helps to keep the glasses shape consistent in extreme conditions.  The polycarbonate lenses provide 100% UV protection and are of optical quality.

Features:

• Nylon frame with a wire core keeps the shape consistent in any extreme condition
• Injected with the highest quality nylon available
• Precision milled hinges
• Self locking screws
• Optical quality polycarbonate lenses
• 100% UVA/UVB protection
• Exceeds ANSI standards for shatter/impact resistance
• Medium fit
• Metal Black Flys logo on the sides
• Sunglasses case included
• One year warranty