The message, printed on the back, requires no explanation. Small CARPE NIX logo on the left front chest. While the graphics and message are our own, the t-shirt itself is a 100% cotton Comfort Colors Unisex Heavyweight Short Sleeve Tee, selected by New York Times Wirecutter as "the Best T-shirt I ever bought." Let everyone know where you stand on climate change, and be crazy comfy doing it.