[Adjustable for Bigger Arm] - Size L: Suitable for Bigger arm circumferences of 14 -17 inches. The upgraded design of the running armband can easily adjust the armband to perfectly fit the small but strong arm. With Adjustable Velcro, it can be moved to different positions to meet different arm sizes. Reminder: If you have strong arms, please remove the extra velcro to avoid rubbing your skin

[Fit 99% Phone Size] - GUZACK phone pocket can fit cellphone screens up to 6.9 inches, fits iPhone 17/16/15/14/13/12/11 Pro/Pro Max, Samsung Galaxy S25 Ultra / S25+ / S25 / S24 Ultra / S24+ / S24 / 23/ S22/ S21 Fe, S21+, S21, Note/A Series, Google Pixel, Motorola Moto G Stylus 5G, LG, Oneplus and other phones of similar size. (Accommodates a thin phone case, NOT compatible with Otterbox Case)

[Unique Zipper Pocket] - GUZACK waterproof armband adds a unique zipper pocket design, which is beautiful and practical, and can hold small items such as earphones or car keys. The built-in hidden pocket on the back can store credit cards, ID cards, receipts, etc. Comes with a closed cap to effectively prevent sweat from entering your phone and card

[Anti-Drop Buckle] - GUZACK phone armband for running is equipped with an anti-trip buckle, which will not fall off during exercise to protect the safety of the cellphone. Reflective strips surround the screen to enhance visibility at night, it is specially designed for night running enthusiasts. It is very suitable for most outdoor sports activities, such as jogging, running, biking, climbing, hiking, gym, etc

[Sensitive Touch ] - The clear TPU screen supports multiple unlocking options such as password unlocking, gesture unlocking, face ID, etc. Easily accessing the touch screen function of your phone, without removing the phone, you can enjoy playing the apps. The running armband is made of polyamide fabric, which is waterproof, sweatproof, washable, soft and light, skin-friendly and breathable, and will not scratch the skin