What must a Marine wear during weigh-ins and BCEs for accurate measurement?

For accurate measurement during weigh-ins and Body Composition Evaluations (BCEs), Marines are required to wear the green-on-green uniform. This standardized attire ensures consistency in weighing procedures by minimizing variables, such as clothing weight and type, which could affect body composition readings.

The green-on-green uniform is specifically designed for this purpose, allowing for accurate and reliable assessments that conform to the military's regulations. This uniform provides a uniform method of measurement across all Marines, facilitating fair comparisons and maintaining the integrity of the data collected.

While other options may suggest comfortable or casual attire, such choices would introduce variability in measurements and potentially compromise the accuracy of the weigh-ins. Thus, wearing the green-on-green uniform aligns with the military's commitment to precision and standardization in physical assessments.