Each shirt features a design on the inside of the neck inspired by the warming stripes developed by climate scientist Professor Ed Hawkins, at the University of Reading.  The warming stripes illustrate the rise in average global temperature since 1850, showing powerfully how our climate is changing. See the full stripes at

We have also included the graph on the side seam of all our shirts. The graph shows the loss of biodiversity since 1970, reversing this is a crucial element in restoring balance to the planets ecosystem.