Max Wilford is an adorable seven-year-old boy battling a rare form brain cancer whose classmates and principal are trying to make the world’s longest Rainbow Loom chain in his honor.

On Wednesday, Jimmy Kimmel joined the cause, inviting Wilford to appear on his show, where he donned a special “Suit of the Loom” — which he’s auctioning to benefit The Max Love Project — and brought out Iron Man to meet the little patient.

At the end of the segment, Kimmel choked up with emotion.

Check out the video below, and grab the Kleenex.