100% Nylon New Usage:You may be confused about how can birdies be applied to baseball batting training.Actually many pros hit birdies for warm-up. It is a fun, efficient and economic drill, particularly suitbale for indoor practice Enhance Batting Timing Accuracy: You can throw birdies to your player, simulating different pitching trajectory and speed, so that they can practice different speeds and movements and improve their timing Improved Hand - Eye Coordination: Since the cork base of birdies is small, your players should keep concentration on the trajectory of birdies and hit on the sweet spot, which will help improve their hand-eye coordination Easy and Fun to Use: It doesn't matter if you are a professional coach or good pticher, our shuttlecocks will make toss easy. You can get batting practice indoor without worring about doing damage to your house Our nylon shuttlecocks can also be used for badminton amateur training and outdoor recreation. [24 pack] is highly cost-effective