Using this Basil frame bag is a breeze. First, find a suitable spot on your bike frame and attach the bag using the hook - and - loop fasteners. Open the main compartment to store your smartphone and other small items. Put smaller things like keys in the inner mesh pocket. When using your phone, you can operate the touchscreen through the window and thread your earphone cord through the opening. Remember, when it's raining, use the rain cover to protect your belongings. To keep the bag in good condition, clean it with a damp cloth regularly. Avoid using harsh chemicals that could damage the water - repellent polyester. And check the hook - and - loop fasteners from time to time to make sure they're still strong.