RIO Powerflex Trout Leaders - RIO's new Powerflex Trout Leaders were designed with expertise, using cutting edge technology and materials. These leaders are very durable and will turnover with ease while fly fishing in vaRIOus conditions, whether casting dry flies, streamers or an indicator with weighted nymphs. The pre tied perfections loops included with each leader enables anglers to quickly and easily change leaders, which means more time on the water. High StrengthClearPerfection Loop