The Flex is specifically engineered for your active lifestyle complete with IPX5 waterproof standards antibacterial ear hook surface and tangle-free cable. Ergonomically designed for comfort the Flex's proprietary form-fitting ear hooks are designed against fallout during any workout while the ported acoustic chamber showcases SOUL's signature sound.? FLEX FIT: The proprietary form fitting antibacterial ear hooks are designed to fit securely regardless of the shape of your ears against fallout.? WATERPROOF: Adhering IPX5 waterproof standards the Flex is washable and was engineered to work under the most arduous workout.? ULTRA LIGHT: Designed to not weight you down while you workout practice or exercise. Train with the Flex so you can run faster jump higher and get stronger!? ADVANCED DRIVER AND CIRCUITRY DESIGN: Engineered with SOUL's signature sound for pure balance of powerful bass and clear mids and highs.? TANGLE FREE AUDIO CABLE WITH SWEAT RESISTANT APPLE IN-LINE CONTROLLER: Eliminates the need to constantly untangle your headphone cable. Allows instant use every time.? SPORTY CARRYING POUCH: Soft carry pouch for easy storage and protection.