This is a vintage (and worn) cotton t-shirt. It features a graphic print of Gaston Lagaffe, a French cartoon character made in France. What makes this t-shirt unique is Gaston Lagaffe, one of the best-known and most well-liked characters from Andre Franquin first appearing in 1957.  The character is an "anti-hero" working as an office drone and errand boy but he never gets any work done preferring to spend his work days cobbling together mad contraptions, playing music and keeping a range of animals and plants or simply sleeping.