Hollow fibre construction for high buoyancy Ultra-Dry treatment to prevent water saturation Crinkled appearance for increased grip on the surface film to further boost buoyancy Displays a natural sparkle & shimmer effect providing added attraction to your fly patterns A multi-purpose yarn prefect for all dry fly applications especially when you need something to float high Ultra Dry yarn is a hollow fibre construction, high floating yarn, treated with our Ultra-Dry treatment process to give unparalleled buoyancy.