On the same night as the A Celebration of Life tribute concert in memory of Mac Miller, friend and collaborator John Mayer announced a special t-shirt collab with all proceeds going to charity.

The shirt was designed in collaboration with Jeremy Dean and is described by Mayer as being made "in honor and remembrance" of Miller. "Had the honor of working with [Mayer] and some of Mac Miller's existing design elements to do a shirt for tonight's tribute to Mac in LA," Dean added.

Get a closer look at the commemorative tee below. The tribute piece is available for pre-order now for $50 with an expected shipping date of Nov. 18. All proceeds will go to Miller's own Circles Fund, an advised fund that continues Miller's commitment to young artists by providing underserved areas with creative resources and arts-related programming.

swim
Image via Publicist
swim
Image via Publicist
swim
Image via Publicist

Mayer was joined at the sold-out Greek Theatre on Halloween night by SZA, Travis Scott, Schoolboy Q, Vince Staples, and more for an evening of music and memories honoring their late friend, inspiration, and—in many cases—frequent collaborator. Mayer performed "Small Worlds," the Swimming cut on which he originally solely handled guitar duties. Revisit both versions of the track below.