Purchased at the University of Hong Kong This is a microfiber cloth. It can be used not only for cleaning glasses, but also for mobile phones, computers, musical instruments, etc. ^_^ Environmentally friendly microfiber smartphone cleaner. - Brand: THE UNIVERSITY OF HONG KONG - Design: Geometric pattern - Material: Microfiber - Use: Smartphone cleaner - Features: Environmentally friendly, allergen-free, ultra-soft #University of Hong Kong #Hong Kong #Glasses cleaner #University entrance exam #National and public #Cleaner