Though a favorite of hype beasts for years with his collaborations with Nike and his own eponymous luxury streetwear apparel line, designer and artist Heron Preston’s network of fans is increasingly growing blue thanks to partnerships with two of the most iconic denim brands in the world.

In April, Preston bowed his first collection with Calvin Klein—the brand’s first-ever collaboration—featuring men’s, women’s and unisex elevated basics. Spanning underwear and T-shirts to core denim silhouettes, the collection was made with the planet in mind using ingredients like organic and recycled cotton and raw denim to help save water. Working with Preston, combined with launching a campaign full of famous faces like models Ashley Graham and Kaia Gerber, helped Calvin Klein tap into a younger demographic. The collaboration also yielded some of the highest average unit retail (AUR) the brand has ever seen.

The Calvin Klein collection followed Preston’s second collaboration with Levi’s. The collection, named “Mistakes are OK,” featured a series of denim jackets and jeans with intentional errors, including exposed and asymmetrical pocketing, an upside-down coin pocket, mismatched hardware, raw seams, exposed linings and off-register resin prints.

The imperfections told a story close to the designer’s heart. Though Preston was born in 1983, a clerical error caused his birth certificate to read 1873. The imperfection became even more meaningful when a Levi’s employee pointed out the implications of the year 1873. It’s the same year the first-ever blue jeans were patented.