Back view of Lenny Mueller, a German model who frequently works with ACRONYM, wearing a black sleeveless shirt with distinctive pink/magenta-colored hair. The shirt features a large red downward-pointing triangle at the center. Below it, white text reads 'CEASEFIRE NOW' and 'FREE PALESTINE' with a small Palestinian flag symbol. The shirt includes multiple collaborative branding elements: 'A YOUNG HIKER' at the top, 'ACRONYM' logo, and several other design elements and logos arranged vertically down the back. Mueller has extensive tattoos on both arms. This was a charity collaboration shirt between techwear brand ACRONYM (founded by Errolson Hugh) and Parisian outdoor fashion retailer A Young Hiker to raise funds for Palestinian causes.