Many of the trendy, black-heavy looks had detailing which literally saw clothes reversed inside out.
Inner pockets were put visibly on the outside, and inflated sleeves were made of a different material to the bodice to conjure up the slightly deconstructed image of what a jacket looks like when it's turned the wrong way out.
But "reversing" could have also easily meant "contradictions" — in many of the diverse styles of his 2013-14 menswear show.
"It's about contrasting beauty with masculine versus feminine, and classic versus street," said the designer backstage.
Many of the sheeny bomber jackets and gold caps did indeed give the show a distinctly street vibe, reined in by the traditional 1950s feel in long overcoats and jackets.
The play on size, too, — a Juun J. signature, and very on-trend — made for top heavy, contrasting silhouettes.
An oversized short, masculine overcoat, featured on top of a long, feminine jacket that hung like a skirt.
In the leg department, too, this contrasting size continued, with the mainly skinny pants adding to the fashion conversation with hemlines cut above the ankle to show off the boot.
Juun J., a relative newcomer to the Paris calendar, is turning out to be one very trend-conscious menswear designer.
Thomas Adamson can be followed at http://Twitter.com/ThomasAdamsonAP