sartorialism
AN INTEREST IN MATTERS OF OR RELATING TO THE TAILORING OF CLOTHING.
From sartorial, itself from New Latin sartorius (“pertaining to a tailor”), from Late Latin sartor (“tailor”), from Latin sarcire (“to patch, mend”).
It is not only the interest towards tailoring, a specific look or dress code, but it is also about who you are as a person. It is a lifestyle.