The McCoy’s Boondoggle Isonychia Spinner is a precision-crafted dry fly designed to imitate the adult spinner stage of Isonychia mayflies.

With a high-floating hackle and natural-tone body, this pattern creates an irresistible silhouette for trout and other freshwater species.

Perfect for matching Isonychia hatches in rivers and streams, the Boondoggle delivers lifelike movement and excellent visibility, making it a must-have for selective fish during mayfly season.