SE-009C Freestyle Swimmers Snorkel. Freestyle technique and training snorkel. Focus on Freestyle Technique while building lung capacity. Designed for Freestyle, curved shape promotes proper head position with eyes down. Center-Mount Design, relax in the water in order to focus on stroke and improve technique. Adjustibale Head Bracket, can be worn in conjuction with swim cap or goggles. VO2 Max, receiving air from the snorkel increase lung capacity.