Swim comfortably for hours. With the POWERBREATHER SPORT, you no longer need to twist your body to breathe, allowing you to swim effortlessly for hours. This symmetrical snorkel allows you to focus on improving your time and technique. Unlike other snorkels. Unlike most snorkels, the POWERBREATHER draws in oxygen-rich air from the top of two tubes, and expels carbon dioxide from the bottom, preventing carbon dioxide from mixing with the inhaled air. Unobstructed vision while swimming. Standard snorkels, and even full-face snorkels, can obstruct your vision while swimming. This unique, U-shaped, size-adjustable snorkel mask, designed and developed in Germany, allows you to swim with completely unobstructed vision. No water enters the top air intake. Every swimmer has experienced water entering their goggles, snorkel mask, or snorkel. It's uncomfortable. The POWERBREATHER uses one-way air valves to prevent water from entering, so you can breathe only fresh, water-free, oxygen-rich air. ♀ Gain a competitive edge. An excellent choice for triathletes, open water swimmers, freedivers, endless pools, and snorkeling. This unparalleled snorkel can be worn with any swimming goggles or diving mask. For ages 12 and up. Used once and then stored. Please refrain from purchasing if you are extremely concerned about the condition. Please also check my profile.