The Nike Book 1 "Ashen Slate" is a colorway of basketball star Devin Booker’s first signature shoe with Nike Basketball that pays homage to his life journey. The “Ashen Slate” features details inspired by Booker’s life, including a barcode on the insole that references his jersey number with the Phoenix Suns and the zip codes of his hometown of Grand Rapids, Michigan, and his NBA home of Phoenix, Arizona. Moreover, his family’s initials are also seen on the underside of the tongue.