FINIS GLIDE Swimmers Snorkel Allows swimmers the ability to focus on stroke technique without the interruption of turning the head to breathe. The center-mount design accommodates a full range of motion for butterfly, breaststroke and freestyle. Hydrodynamic tube curves around the head to reduce drag and promote proper body position. V02 max  Increases aerobic capacity and builds lung endurance. Adjustable head bracket makes for quick strap adjustments and a universal fit.