The mark consists of the wording "NATM NATIONAL ASSOCIATION OF TRAILER MANUFACTURERS" in blue above a white box outlined in blue, all inside a circular background featuring red and white stripes, which is outlined with a yellow circle, which in turn is outlined with a blue circle featuring the wording "MANUFACTURED IN COMPLIANCE WITH NATM GUIDELINES" and a star in white, which is then outlined with a yellow circle.

The mark consists of the wording "NATM" in white sitting on a black trailer with a white stripe and white accents on the tires. These elements appear inside a red oval that is outlined with a white oval, which in turn is outlined with a black oval. The black oval features the wording "NATIONAL ASSOCIATION OF TRAILER MANUFACTURERS" in white around the oval. A white dot appears before the word "NATIONAL" and another white dot appears after the word "ASSOCIATION".