This is a Request for Information (RFI) from NASA’s Human Research Program, seeking capabilities for head-down tilt bedrest research in the United States. The studies would support human spaceflight research and other multi-discipline objectives, typically requiring 30-60 days of bedrest, with a maximum of 90 consecutive days. The program aims to mitigate astronaut health risks and develop countermeasures for safe human space exploration. No specific budget amounts, submission timelines, or performance location are mentioned in the description. Interested parties are asked to provide a capabilities statement, though the government has no obligation to award a contract.