Hareline UV2 Seal-X is a premium synthetic dubbing material designed for fly tiers who demand the highest performance. Blending the look and texture of natural seal fur with the enhanced visibility of UV2 technology, Seal-X offers lifelike translucency and movement in the water. Ideal for nymphs, streamers, wet flies, and steelhead patterns, this dubbing picks out easily for a buggy profile and reflects both UVF (ultraviolet fluorescence) and UVR (ultraviolet reflectance) to catch fish attention in all light conditions.