It is like drawing inside-out, to make a picture in white on a dark background. Basically everything which should become dark, is a hole and is not drawn.
You can now buy these T-shirts on Etsy! This is the product description which we wrote there:
Made from 100% natural organic cotton. You can read more about the production of these shirts here: www.stanleystella.com/en-gb/sustainability-responsible-production
Drawing by Paul Veenvliet, a Slovenia-based biologist and nature tour guide. See www.animaldrawings.eu for more of his work.
Printed in Slovenia. We currently have male shirts in navy blue and female shirts in burgundy red. For either one, you can choose between a Lynx or a Brown Bear print.
Our t-shirts have been awarded the Bear-Friendly logo, which is given to products which support the co-existence of large carnivores (Bear, Wolf & Lynx) and man in Slovenia.