Dario Mazzoleni's studio sits above a shuttered cinema in the Isola district of Milan, and on the afternoon we meet it is covered in garments turned inside out. This is deliberate. Mazzoleni, who founded the label Ossatura six years ago after a decade cutting patterns for larger houses, believes the inside of a garment is where its future is decided. Every seam allowance is generous, every lining detachable, and every piece carries a small printed card explaining how to take it apart.

I asked him first why he designs for a second owner rather than the first. He laughed and said the first owner is easy. They choose the piece, they love it, they wear it. The real test comes years later, when it is sold on or handed down to someone with a different body, a different life and no emotional attachment. If the garment cannot adapt to that person, he said, it was never really finished.

A garment that cannot be altered is a garment with an expiry date. I would rather make something that is never quite done. — Dario Mazzoleni

In practice, this means extra fabric everywhere. Ossatura trousers carry almost four centimetres of spare cloth at the waist and seat, and a hem that can be let down twice. Jackets are built with shoulders that can be reshaped without dismantling the whole garment. He showed me a coat from his first season that has since been altered for three different owners, each time by a different local tailor following the instruction card.

Resale as a design brief

When I asked whether this made commercial sense, he was refreshingly frank. It costs more in fabric and labour, and the margins are thinner than he would like. But Ossatura runs its own resale service, buying back pieces for store credit and refurbishing them in a workshop behind the studio. Around a fifth of the label's revenue now comes from garments it has already sold at least once, a share that grows every year.

He described the resale data as the most honest design feedback he has ever received. If a jacket keeps coming back with the same worn elbow, the next version gets a reinforced patch. If a colour sells slowly the second time around, it disappears from the line. He compared it to a chef who can see exactly what is left on every plate, and admitted that the lessons are occasionally humbling.

I asked what frustrates him about the wider industry's sudden interest in circularity. He chose his words carefully. Too many brands, he said, treat resale as a marketing gesture layered on top of garments never built to last. Real circularity starts at the pattern-cutting table, long before anyone plans a campaign. He added, without naming names, that a lot of recycled polyester simply delays the landfill by one trip through the washing machine.

Toward the end of our conversation, I asked what he hopes people feel when they buy one of his pieces. He thought for a long time. Responsibility, he said eventually, but the pleasant kind, like being handed a well-loved book with notes in the margins. He hopes his clothes will outlive him, and that someone, decades from now, will open a seam and find his little card still tucked inside.