The 37-item Multidimensional Assessment of Interoceptive Awareness, Version 2 (MAIA-2; Mehling et al., 2018) assesses body awareness; that is, the ability to notice sensory signals originating from inside the body that provide information about its physiological states, processes, and actions. The MAIA-2 can be administered online or in-person to adults, including to clinical populations such as people with chronic pain, eating disorders, and depression (the 32-item MAIA-Youth should be used for children and adolescents). The MAIA-2 is free to use, and no written permission is required to use it for scholarly and non-commercial purposes. This chapter first describes the development of the MAIA-2, and then provides evidence of its psychometric properties. More specifically, the MAIA-2 was initially purported to have an 8-factor structure within exploratory and confirmatory factor analyses. However, fit indices for the 8-factor model have been less-than-ideal in numerous studies, and more recently authors have found acceptable model fits when examining bi-factor models and a higher-order models, suggesting that the MAIA-2 items and scales, respectively, also load onto a general factor, with the exception of the Not-Distracting and Not-Worrying items, which may correlate with this factor. MAIA-2 scores are scalar invariant across men and women, and composite reliability, test-retest reliability, convergent validity, discriminant validity, and incremental validity largely support the use of the MAIA-2. Next, this chapter provides directions to the MAIA-2 items and instructions for administration, and the item response scale and scoring procedure. An overview of available translations and abbreviations is provided. Finally, permissions, copyright, and contact information are provided for readers.