ACTIVE SUNGLASSES has a revolutionary style and is a uniquely innovative and playful design.The secret lies in a special hinged nose bridge on the frame and a silicone-coated metal spring in the temple.ACTIVE SUNGLASSES are the worlds first sunglasses that fit snugly on your head so they not only dont fall, but flex to attach to your wrists, ankles, the handlebars of your bike, the steering wheel of your car, or anywhere else.