Using this bike seat bag is a breeze. First, find a suitable spot under your bike seat and use the straps to secure the bag firmly. You can put items like your phone, keys, energy bars, or a small repair kit inside. When riding at night, attach your taillight to the mount and make sure the 3M™ Reflective Strip is visible. As for maintenance, clean the bag with a mild soap and water when it gets dirty. Avoid using harsh chemicals that could damage the Teflon - coated polyester. Don't overstuff the bag beyond its 0.66L capacity to maintain its shape and functionality. Also, check the straps regularly to ensure they are in good condition and tightened properly.