Ever so slightly weighted,lead thorax and copper wrapped segmented body, you can fish these guys on their own on a long, light tippet and sight fish, suspend them below a dry, or for deeper pools use a Stus extra heavy nz tungsten beaded nymph to drag it down to the fish. The extensive testing period with these flies has told me all i need to know, this NZ mayfly nymph is gonna catch a lot of anglers a lot of fish!