Quad Anthros can often get away without wearing clothing, but the fact is that clothing is incredibly useful. So they tend to have as many options as a bipedal anthro. Allen is no exception.

As a crane operator at construction sites, Allen has many sets of work clothes. Basically the same things a bipedal anthro would have, just adapted to him.

These were drawn by the talented  Apple Wyvern. Go check them out.