Introducing the Isac by Protest. As part of our quest to create the perfect T-shirt, we have been experimenting with fabric and fit and this is the result. This tee is made from a 100% cotton fabric. The fit is regular. The Isac has a small print at the chest and if you turn the T-shirt around, you’ll find the same print enlarged on the back. This print is of a palm tree erupting from a snow covered mountain – two of our favourite things! The T-shirt that will make your summer even better, the Isac by Protest. This model is 1.85m and wears size L / UK 40.