Medical Data Carrier (MDC) is a unique, uni-lingual or bilingual, medical Information system that provides critical lifesaving data about the wearer as well as crucial family contact information in the event of an emergency. The highly visible, secure and aerodynamic carrier attaches to the left side of the individual’s helmet and is safe for all helmet surfaces. Bold text on the outside of the carrier warns good samaritan responders to leave helmet removal to those trained in the proper technique. Improper removal can result in collateral injury, paralysis or worse. Inside, a two sided, water-proof synthetic paper contains information on the wearer’s identity and medical history including information such as allergies, medications, blood type and pre-existing medical conditions, that assists first responders with the crucial triage stage of the wearer’s care