At its beginning, 3sixteen worked directly with Kuroki Mills in Okayama, Japan to develop a custom 14.5oz selvedge denim,[1][11][12] and has continued to source custom woven denim from the mill in the years since.
3sixteen has engaged in many partnerships throughout its history. 3sixteen collaborated with Blackstock & Weber on a rubber crepe sole loafer.[13] In 2024, 3sixteen collaborated with Schott on a bomber jacket.[14] In 2024 3sixteen and Crocs co-created a clog.[15]