Listen up all you triathletes and lap swimmers.  If you are a fan of Natalie Coughlin’s signature series iSH2 you’re going to love her new Interval Waterproof Headphone System.  The Interval combines the sweet sound quality and waterproof performance of our Surge Waterproof Headphones with the battle tested Waterproof 2nd Gen Shuffle case found on the iSH2.  I had the opportunity to see Natalie in action with the Interval (See Video) but to my chagrin a horde of adolescent swimmers thwarted my one opportunity to meet the Olympic swimmer.