This great Geek t-shirt is for anyone who understands binary. Features the slogan \"There are 10 types of people - those who understand binary and those that don\'t\". Of course \'10\' is number 2 when written in binary, but then if you didn\'t know that already then this one is probably not for you! #8ballbestseller Sustainability Message All 8Ball Originals garments are WRAP certified, REACH compliant and Fair Labor Association accredited. They are printed in UK using Oeka-Tex and GOTS certified water-based inks.