Designed to help you improve performance by energizing your music experience the sennheiser ocx 686i sports headphones feature adjustable ear hooks for extra hold and maximum freedom of movement when exercising this ultra lightweight sweat and water resistant sports headset is compatible with apple devices and offers a unique sealed in ear canal design to reduce background noise and let you focus on your workout there are hygienic steritouch antimicrobial ear adapters and a strong and a dura