Ida Wirak Trettevik has been making knitting patterns under her own brand, Witre Design, since 2018. The patterns are sold from her webpage, www.witredesign.no, and she markets Witre Design through Instagram, @witredesign, and with tutorials on YouTube. She had her debut as an author with her first knitting book, «En strikkers år», in 2020. Her second book «Strikk med Witre Design» was published in spring 2022. Ida lives in Oslo, and works today full time as a designer making knitwear and knitting pattern