The FINIS Center Mount Swimmer's Snorkel over the face design allows a swimmer to use goggles while swimming with a snorkel. This design reduces drag and tension otherwise felt with side mount snorkels. Swimmers with neck, back, or shoulder problems can swim with reduced tension on the injured area because they do not have to turn their head to breathe. Allowing the swimmer to keep their face down in the water and concentrate on and watch their stroke is a great way to improve on stroke mechanics. With significant training, proper stroke technique, body position, balance, and streamline positioning can be committed to memory. In freestyle, a coach can observe head position and body roll. In butterfly, the swimmer can concentrate on finishing the arm stroke by eliminating the effort involved in the breathing cycle. Using a snorkel forces the lungs to work harder and increases aerobic conditioning. The distance the air has to travel to get to and from the lungs is increased by the length of the snorkel. This forces the swimmer to develop a stronger inhale and exhale while swimming. As the lungs develop, fewer breaths will be needed for each lap, which will reduce times. Because dead air can be trapped in the snorkel, the lungs also learn to buffer CO2, which can greatly assist in hypoxic development. Training with a snorkel can be considered similar to altitude training. The snorkel can be used at all times or for specific sets.