This article studies the individual characteristics of people between 15 to 29 years old who Not in Employment, Education or Training (NEET) in Mexico during 2010. The analysis is divided by age and sex, as well as considering the transition to adulthood. For instance, we divide the population NEET into two broad categories: young NEETs, those who have not made any transition to adulthood and adult NEETs, those who have already gone through some of the transitions to adulthood. This study finds that NEETs are not an homogeneous group but have different characteristics as life trajectories. Also, NEETs are not just the result of economical exclusion but the product of how society assigned gender roles.