Simplicity itself and very very effective. No moving parts or springs etc. to separate or become lost. Industrial strength wire has memory bend it to fit your nose and it ll stay in position. The ends are padded and vinyl dipped for comfort and warmth. A looped lanyard attaches securely to PFD or helmet strap to keep your Smiley s always near at hand. Essential for rolling classes practice and often used by paddlers every day they re out on the water. And they verge on being stylish enough for off-river wear.