The exosome marker antibodies have been validated against exosome-associated antigens to characterize and/or quantify exosomes in cell culture media and biological fluids, making them an essential tool in exosome research. All high-quality exosome validated antibodies have been selected to specifically detect CD9, CD63, and/or CD81 which are widely used as exosome markers. The antibodies can be selected individually or as part of a convenient and economical collection containing 20 µg of each of the following antibodies: CD9 Clone CGS12A, CD63 Clone CGS82X, and CD81 Clone CGS36K.