Made of premium Nylon, which is durable and waterproof. The fanny pack inside is in lined with soft material to avoid friction to the phone and causing any damage. The adjustable strap can easily and quickly adjust to the length you want, which allows you to wear it around your waist as a bum bag or belt bag while running, or keep it in the front as a chest bag for easy access. The fanny pack is lightweight and easy to carry and can hold your phone, wallet, passport, keys, ID, and other small items for great convenience. Lightweight comfortable waist bag is perfect for shopping, traveling, festivals, and theme parks, Great for jogging, dog walking, cycling, hiking, and other outdoor activities.