Take open-ear listening to new depths. OpenSwim (formerly Xtrainerz) is engineered with Shokz’s 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.