AfterShokz Xtrainerz Open-Ear MP3 Bone Conduction Wireless Sport Headphones, Waterproof $119.96
LEAVE YOUR DEVICE BEHIND - 4GB of built-in MP3 storage holds up to 1, 200 songs, so you can load your favorite music, podcasts or audiobooks and dive into your workout. Xtrainerz support MP3, WAV, WMA, AAC, and FLAC files. Not Bluetooth compatible.
8 HOURS OF PLAY - Enjoy 8 continuous hours of premium audio while you're cross-training. Adjust volume and tracks at the touch of a button.
IP68 RATED - Fully waterproof, Xtrainerz headphones perform in and out of the water so your favorite open-ear headphones can keep you company wherever your training takes you.
COMFORTABLE + SECURE - The unique open-ear design of Xtrainerz enables bud-free, pain-free listening, and keeps the headphones in place stroke after stroke.