Assos rs sturmprinz evo jacketassos rs sturmprinz evo jacket is designed to provide you with the best in both waterproofing and breathability its constructed from advanced triton v1 material for ultimate rain protection on the front and triton v2 material for increased flexibility and breathability at the rear this material also reacts to subtle temperature changes becoming less breathable in cold conditions and more breathable in warmer conditions features material windproof triton v1