Product descriptions: - Power cord or strap for sunglasses / spectacles. - 2-type: a) Loop strap (weighs only 2 grams) b) Rubberized end (weighs only 6 grams & adjustable). - Can be used with most type of sunglasses or spectacles. - Made from nylon/polyester. - Products from Bolle Safety, France. Note: Please ensure you choose the correct type based on your eyewear. Item once sold strictly not refundable / exchangeable.