The color(s) blue, blue-grey, black and white is/are claimed as a feature of the mark.
The mark consists of A square turned 45 degrees with the left corner being blue-grey, the top corner dark blue, the right corner a stylized arrow in black, and the bottom corner light blue, under which is the wording FILTERS4AIR in black, with the number 4 bolded.
FILTERS FOR AIR; FILTERS FOUR AIR