Front Cover: In article 2300323, Tae‐Gyun Kwon, Juyeong Lee, Oong Hyeon Jo, Beom‐Goo Kang, and Sang Wook Kang develop a polymer nanocomposite membrane, featuring grey spherical polyacrylonitrile (PAN) nanoparticles evenly dispersed in an orange poly(vinyl pyrrolidone) (PVP) matrix. This design highlights the nanoparticles' role in enhanced gas absorption and membrane selectivity.