[Secure Fit - Built For Runners] These running earbuds were designed with the input of hundreds of runners, creating the ultimate Bluetooth headphones for running; their comfortable ear hook create earbuds that don't fall out during a run or workout ^^ [Waterproof] Take these waterproof Bluetooth earbuds on any adventure, rain or shine; The IPX-7 rating means the Bluetooth waterproof earbuds are perfect workout headphones for use while running in the rain; [NOTE: they are NOT designed for swimming] ^^ [80 Hour Battery Life] One charge lasts for 2 months of workouts with these earphones' wireless charging case; Each over the ear bud can play music for 8 hours, and the charging case will recharge them 9 more times for a total of 80 hours of use ^^ [Belt Fits Any Phone] The slim, comfortable design keeps a low profile on your waist, while the expandable pockets allow you to securely carry any sized phone. Back Bay's exclusive accordion folding design allows the pocket to stay as slim as possible ^^ [Adjustable and Comfortable] With a stretchy waistband, an ultra-thin clip, and an adjustable belt, the Bay Belt moves with you, and is comfortable for people of all sizes. [Fits Waist Sizes 25 to 51]