A PacSun.com Online Exclusive! Electric takes their classic Knoxville Sunglasses and puts a distinguished twist on them. The Hardknox Sunglasses are created from handmade acetate and hold onto pristine lines. Tortoise frames with Electric branding on hinges Square styled frames with black lenses 100% UV protection 6 base handmade acetate wire core frames 6 base CR39 lens Leather carrying case included Imported