H2O Audio has the Interval Waterproof Headphone System for $79.99 with Free Shipping for a limited time. Offer includes a FREE swim cap and goggles ($26 value). Deal expires September 8, 2009. Use coupon code: freeship2 to get free shipping at checkout.

The Interval Waterproof Headphone System is used by gold medal swimmers Natalie Coughlin and Michael Phelps, Interval helps you swim longer and train harder by providing the soundtrack to your next swim session. It’s sleek waterproof case and integrated waterproof headphones attach to practically any swim goggle making it a low profile, hassle-free way to stay motivated during your next swim.

It is waterproof up to 12ft/3.6m, is compatible with the iPod shuffle 2nd gen, and attaches easily to most swim goggles. There is a integrated control pad that allows for control of the iPod shuffle while in the water and is acoustically engineered for exceptional clarity and bass. It includes 5 sets of earplugs (size XS – XL) to provide an individualized fit and watertight seal.