This funny t-shirt features the funniest number you can type into a calculator - 5318008. This is of course because when you turn the calculator upside down it looks a bit like \"Boobies\". Bring back memories of giggling at the back of a maths class with this tee. This is a 100% cotton funny T shirt. 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.