JEMACHE Running Armband for Samsung Galaxy S21 Ultra, S20 Plus, S21 Plus 5G, S20 FE, Note 20 Ultra 10+ 9 8, Gym Workouts Arm Band with Earbuds Pocket, Card Holder (Navy Blue)

Custom Design: The small part at the end of the band prevents your device from dropping when disassembled.
Special Features: Built-in key pocket stores your house key while exercising. Rear pocket is for storing ID, Credit Card, and Cash. The armband with design of a reflective strip at peripheral transparent screen is as a safety reminder when you are running or other sport activities.
Premium Materials: After hundreds of tests, we choose the most appropriate thickness of soft neoprene materials, this armband can easily bends, flexes, twists or folds without warping or bulky, it stand up to your toughest workouts.
Widely Adjustable: Adjustable band supports a wide range of arm girth, with extender and double-sided sticky design, it suits all arm sizes between 15cm-56cm. (It finally comes a armband which fits the ultra-thin arm)
Multiple Compatible: This armband is perfect fit for Samsung Galaxy S21+ S20+ S10+ S9+ S8+, S20 FE, S21 Ultra, S20 Ultra 5G, Note 20 Ultra 5G, Note 20 10+ 9 8, It is big enough even if your device has been put into protective case.