Starfleet uniforms are uniforms worn by individuals serving in the Federation Starfleet (and the earlier Earth Starfleet). These uniforms facilitate the wearers' needs as scientists and researchers, and are also adapted for Starfleet's sometime military role.
Starfleet uniforms are generally characterized by division or department color, displaying rank insignia and position to convey authority and purpose between personnel. They are designed for comfort even in the most extreme environments.
You can download a complete set of all images on this page from the Fleet Services website linked here.
Marine uniforms are uniforms worn by individuals serving in the Starfleet Marine Corp (SFMC). These uniforms facilitate the wearers' needs for both combat and support needs in a marine unit.