1. Center-mounted design for snorkel: Whether you swim competitively or swim for therapeutic or rehabilitation reasons, a swimming snorkel is essential swimming gear. This pool swimming snorkel allows swimmers to keep their heads still so you can focus on swimming technique, body position, balance, and efficiency, which makes it the perfect swimming snorkel for swimming laps and a great addition to your swimming gear. 2. Comfortable silicone mouthpiece: You'll love this soft, flexible, premium silicone mouthpiece, which not only helps swimmers keep their snorkel in place while swimming, but also feels so comfortable in your mouth that you'll forget the swimming snorkel is there. 3. One-way exhaust valve: No one likes to have water in their swimming snorkel and have to stop to catch their breath to clear it. You can easily clear water from your training snorkel so you can breathe smoothly while swimming. 4. Adjustable padded head frame: This swimming snorkel comes with a padded head frame to help keep the snorkel in place on the swimmer. The head frame is equipped with soft pads to protect the swimmer's head and provide a more comfortable wearing experience. The head frame also comes with an adjustable silicone headband for easy wearing. Simply pull the headband into position and the buckle will securely fasten it. Before first use, use the provided screws to properly secure the headband to the breathing tube.