A device, namely a detactable fastener accessory that can be used to cover a fastener, preferably a snap cover of an article of clothing, the accessory having or adapted to have a decorative cover piece connected thereto. In a further embodiment, the fastener accessory is part of an extender system that allows an article of clothing such as a vest or jacket to have a greater size by connecting an extension segment, such as a chain, piece of leather or other fabric, between fasteners on opposite sides of the article of clothing, which at least provides the advantages of allowing a user to achieve better ventilation or airflow while riding a motorcycle and also prevents the article of clothing from being blown out of a desired position. When used in the extender system, the fastener accessory allows for matching decorative pieces to be displayed on each side of the article of clothing.