Shokz OpenSwim Wireless Waterproof OpenEar MP3 Bone Conduction Headphones- BlackTake open ear listening to new depths. OpenSwim (formerly Xtrainerz) is engineered with Shokzs signature open ear design and 7th generation bone conduction technology to ensure bud free, comfortable listening all day, in or out of the water. OpenSwim is completely waterproof and submersible, and features four gigabytes of MP3 storage, enabling athletes to train harder; no wires, no devices, no limits. Designed For Swimmers Engineered to withstand all