NASA's National Aeronautics and Space Administration is seeking qualified vendors to provide chamber services for decompression sickness testing related to CO2 countermeasures, under the Request for Quotation (RFQ) number 80NSSC26920246Q-1. The objective of this procurement is to conduct hypobaric chamber testing to support the development of the Aerospace Estimation Tool for Hypobaric Exposure Risk (AETHER), which includes investigating various prebreathe strategies. This testing is crucial for ensuring the safety and effectiveness of aerospace operations involving hypobaric conditions. Interested vendors must submit their quotes referencing the tracking number in the subject line of their emails and can reach out to Shanna Patterson at shanna.l.patterson@nasa.gov for further inquiries.