Regular base makeup is liquid/cream foundation applied via brush or sponge. This type of makeup is appropriate for all different skin types and lasts long hours. Coverage can be light to full coverage.
Airbrush base is applied with silicone based airbrush foundation and via spray gun. This base can provide light to full coverage and is appropriate for all skin types. It lasts all day with minimal touch ups.
Trials are 90 minutes and can be regular, airbrush or both bases. This is a time to play with the makeup and find a perfect look for your event as well as test how the makeup will wear on your specific skin.