Hydrophobic cloth covers the acoustic ports to keep moisture out while letting sound pass through.

They use proprietary StayHear tips with a "wing" design that locks into the ear's ridge without being jammed deep into the canal.

The "open" design doesn't seal the ear canal completely, allowing you to hear ambient traffic or surroundings while running.

, were popular wired sport headphones. While highly regarded for their comfort and secure fit, these models have been discontinued at retailers like in favour of newer wireless technology. : Key Features & Reviews