Ultra-thin Breathable WaterproofThis running belt is made of superior nylon and lycra fabric that has the characteristics of soft and comfortable, moisture-wicking, ultra-thin and breathable, quick-drying and elastic. The material is lightweight so you almost cannot feel it when you put it on. This running pouch is also waterproof to prevent your items from getting wet with sweat. Please don't expose the sports arm bag to a lot of water or rain for a long time. Suitable for a Variety of Waists & Most Phones This running bag is equipped with a flexible and adjustable waist belt, which fits a waist size of 25.6-41.5 inches (65-105cm) and fits most of your family members. Scalable design fits perfectly at the waist, the flip belt won't loosen during exercise. JIMKAN waistpacks is universally compatible with most smartphones of 7 inch (17.8cm) and under including iPhone 13, 14 Pro Max, Samsung S8 S9 S10 S20, Huawei and more. Convenient Earphone Hole & Safe DesignThe fanny pack for jogging is designed with a special earphone hole so you can easily listen to some energetic music and enjoy a relaxed and pleasant running experience. Designed with professional reflector strip for safety and visibility when you are running or walking in the dark! 4 Separate PocketsThis runner waist bag has built-in 2 large pockets and 2 small pockets, a total of 4 pockets to ensure that there is enough space for mobile phones, wallets, keys, cards and other necessities. The separate pockets for easy access and avoids the phone being scratched by keys.