 This research has developed a new type of flexible and lightweight electromagnetic wave-absorbing material using cotton-derived carbon fibers, reduced graphene oxide, and iron oxide nanowires. This hybrid paper is able to absorb microwave energy while maintaining flexibility and lightness. It has a maximum absorption intensity of minus 63 dB and a broadband absorption range of 5.8 GHz, covering the entire coup band. This material could be used for applications such as portable electronic devices and wearables, where it would provide protection against unwanted electromagnetic interference. This article was authored by Yen Cheng, Justin Zhuyao Xiao, Huanching Zhao, and others.