In-ear (AirPods, Beats): Better sound, ANC, but can feel sweaty and you can't hear traffic. Open-ear (Shokz, Sony Float): Safer outdoors, more comfortable, but less bass and no ANC.
IPX4 — Splash/sweat resistant (good for gym). IPX5 — Can handle water jets. IP67/68 — Fully waterproof (safe for rain/swimming).
For gym workouts: Beats Fit Pro 2 — they never fall out. For outdoor running: Shokz OpenRun Pro 2 — you can hear everything around you. Budget pick: JBL Endurance Race 2 at $79.
Best for iPhone runners — Adaptive Audio adjusts to your pace
Best secure fit — wingtips lock in place
Best open-ear — hear traffic while running
Most durable — military-grade tough
Best budget workout — hook design never falls out
Most comfortable — off-ear design