Description
When trout feed on Spent Spinners, they do it with comfort. These dead or dying mayflies will not fly away, making them an easy, high-protein meal. The rise is typically slow and methodical, often in a classic "head-and-tail" style. Many anglers find this stage difficult, as fish become extremely selective when hundreds of spent spinners blanket the surface.
Our Commitment: Perfect Imitation To succeed and perhaps hook the fish of a lifetime, you must observe where the fish feeds and ensure your presentation is flawless. But just as important is the imitation itself. Because the insect is stationary, the fish has plenty of time to scrutinize your fly.
Our commitment is to provide imitations of the real insect where the fly has the right shape, size, proportions, and colours, and, not least, leaves the correct print on the surface of the water. This imitation of an adult mayfly in the Spent stage possesses all the right properties. It looks natural, feels natural, and fish will eat it.
Our commitment is to provide imitations of the real insect where the fly has the right shape, size, proportions, and colours, and, not least, leaves the correct print on the surface of the water. This imitation of an adult mayfly in the Spent stage possesses all the right properties. It looks natural, feels natural, and fish will eat it.
The Micro-Rusty Spinner – J:son Mayfly Spent 5 Rust Red (Hook #24) The Rust Red Spent #24 is a specialized micro-pattern designed for those moments when trout are focused on the smallest dark-bodied mayflies or midges. In many river systems, small spinners take on a deep, rusty-red or mahogany hue as they reach their final stage. In size #24, this fly provides the exact, minute silhouette required to trigger fish that are sipping tiny insects from the surface film with surgical precision.
Creating a fly this small that maintains its balance and buoyancy requires the unique J:son foam construction. The wings are set to lie perfectly flat, mimicking the helpless posture of a spent insect. We know it can be nearly impossible to thread the leader through the eye of a traditional #24 hook; therefore, even though the hook itself is a #24, we have ensured the hook eye remains at least a size #18. This makes it much easier to change your fly and stay effective on the water, even when the fish are rising in the tricky light of dawn or dusk. The Rust Red #24 is an essential "secret weapon" for the most technical fly fishing environments.
Correct Surface Print: The imitation creates the precise flat-winged silhouette on the water film that triggers even the most selective fish.
Optimal Realism: Designed to mimic the spent, exhausted mayfly lying flush in the surface film after egg-laying.
High Quality: Exact proportions and biological colours that perfectly match the natural insect’s final life stage.
Pro Tip: Use a Swivel for Perfect Presentation Because J:son realistic flies are designed with anatomically correct wings, they act like small propellers in the air during casting. This can cause your leader to twist, leading to tangles and poor presentation.
To prevent this and ensure your fly lands perfectly every time, we strongly recommend using a J:son Anti-Twist Swivel. This simple addition will eliminate line twist and let you focus entirely on the fish.

