The Department of Defense, through the Joint Program Executive Office for Chemical, Biological, Radiological, and Nuclear Defense (JPEO-CBRND), is seeking information on wearable CBRN threat monitoring sensors as part of a Request for Information (RFI). The objective is to gather insights on technologies capable of real-time monitoring of various physiological and environmental parameters, including vital signs, cognitive performance, and exposure to chemical, biological, radiological, and nuclear threats, while maintaining low size, weight, and power attributes. These sensors are crucial for enhancing operational safety and effectiveness in environments where CBRN threats may be present. Interested parties are encouraged to submit white papers and technical briefs detailing their capabilities, with responses to be submitted via the Joint Enterprise Technology Tool (JETT) platform. This RFI is for information and planning purposes only, and no funding amount or contract award timeline has been specified.