The fashion line that Nick Jonas released with John Varvatos in 2018 is called JV x NJ. This limited-edition capsule collection debuted in the spring/summer of 2018 and features a range of stylish pieces inspired by Jonas's personal wardrobe. The collection includes items such as leather jackets, t-shirts, and knitwear, all designed with a rock-n-roll spirit that reflects both Jonas's and Varvatos's artistic styles.
For more details, you can check out the article from Variety here or see the coverage on GQ here.