Following his retirement from professional cycling in 2017, Velits co-founded
Isadore Apparel, a sustainable cycling clothing brand based in Púchov, Slovakia, together with his twin brother
Peter Velits. The brand was established in 2013 while both brothers were still competing, with Martin focusing on product development during the brand's early years before dedicating himself to the company full-time after retirement. Isadore produces cycling apparel using sustainable materials including merino wool, with manufacturing based in Europe under
OEKO-TEX and bluesign standards.{{cite web |url=https://www.bike24.com/brands/isadore {{cite web |url=https://posedla.com/blogs/blog/from-the-pro-peloton-straight-to-the-sewing-machine-the-story-of-the-isadore ==Major results==