Zipper closure The best part of this stylish cool bag is after absorbing light in the day about 10-20 minutes, you can see the fluorescent effect in the dark. (Note: This product does not include headphones and mobile phones and charging treasures.) You can easily and conveniently charge your phone or listen to music without opening up the backpack. Put your charging device into the backpack and connect the internal USB cable, then let your charging cable insert the external USB port to connect your electronic device. Connect your phone with inner headphone convert cable, then let your headphone insert the earphone port, enjoy the music! Selection of wear-resistant nylon fabric and heavy-duty inner lining, durable zippers, adjustable padded shoulder straps, and free gift safety lock. Using environmental luminous powder, in natural light or light irradiation, it will show the luminous effect. Lifetime replacement: Provides unconditional, carefree lifetime guarantees, you can rest assured that you can buy and enjoy them all over the world without taking care! If you are not satisfied with the product for any reason, you will receive a full refund. If you have any questions, please send an email to me. The Ideal Gift For Lovers – Looking for the right gift for your loved one? well yes, you searched fortnight and this came up! Guess what! this is what Lovers want!