Designer names appear on garments at prices far below the main collection. Those are separate lines, made differently and often by a different company altogether.
Why a secondary line exists
A luxury brand's main collection reaches a small audience, while its name is recognised by a far larger one that cannot buy at those prices.
A secondary line converts that recognition into volume, selling accessible products to people who want the association without the main line's cost.
Keeping it under a distinct name protects the main collection, since selling both at the same label would undermine the price the original commands.
What changes in the product
Materials are the largest difference, with lower fabric weights, blended compositions and simpler linings replacing what the main line specifies.
Construction follows, since the main collection may use hand finishing and complex patterns that cannot be produced at volume prices.
Manufacturing usually moves to larger factories in lower-cost locations, which changes both the economics and the level of oversight applied to each piece.
Licensing and who actually makes it
Many secondary lines are licensed, meaning another company designs, manufactures and sells the products while paying the brand a royalty on sales.
Fragrance, eyewear and watches are the most commonly licensed categories, and the brand's involvement can be limited to approving designs.
This is why quality varies so widely across a single designer name, since different categories may be handled by entirely different companies.
The risk the brand is taking
A secondary line that grows too large or appears too widely dilutes the name it depends on, which is the classic failure mode of the strategy.
Several houses have withdrawn or repositioned secondary lines after concluding that the volume was damaging the value of the parent brand.
Control over distribution is the usual remedy, restricting which retailers may stock the line and how heavily it may be discounted.
How to identify what is being sold
The label wording is the clearest indicator, since secondary lines carry distinct names, sub-brands or wording that differs from the main collection.
Country of manufacture, fabric composition and the finish of the interior seams give a practical reading of where the product sits.
Judging the garment on its own construction, rather than on the name, is what makes a secondary line a reasonable purchase or an expensive one.