Is 1970s polyester worth anything?

Most of it isn't, plain mass-market double-knit from the era is common and cheap. The exceptions are heavier-weight pieces with crisp, well-registered prints and a real maker's label, ideally tied to a designer or label known for quality construction in that decade. Those pieces can sell well above typical vintage polyester prices.

How can I tell good vintage polyester from cheap vintage polyester?

Check three things: weight and drape (heavy double-knit that moves with you, not stiff or papery), print crispness (sharp pattern edges with no blur or misalignment), and the label (a known maker or designer name, finished seams, and any lining beats an unmarked piece every time).

Why is double-knit polyester different from other polyester fabrics?

Double-knit is constructed on two sets of needles that interlock two layers of yarn into one thicker, more stable fabric. It doesn't curl at raw edges, holds its shape better than single-knit jersey or crepe, and was the fabric of choice for structured 70s pieces like the leisure suit. Lighter polyester crepe and jersey drape more but show wear faster and pill more easily.

Did real designers use polyester in the 1970s?

Yes, though not always in double-knit form. Stephen Burrows built much of his disco-era reputation on matte jersey and color-blocked poly-blends. Halston's signature synthetic material was Ultrasuede, a nonwoven polyester-and-urethane suede substitute, alongside his more famous matte jersey work. Vintage pieces from designers like these now resell well above ordinary 70s synthetic clothing.

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1970s Polyester Double-Knit Is Mostly a Joke, Until You Find the Right Pieces

Kevin GuiJune 23, 2026

Short answer: Most 1970s polyester double-knit was mass-produced filler fabric, and most of it is worth very little today. The pieces that hold real resale value share three traits: heavier weight with a fluid, almost liquid drape instead of stiffness; crisp, precisely registered prints with no blur at the pattern edges; and a label tied to a known maker or designer rather than an unmarked department-store tag. Find all three and you've likely got something worth more than a costume-bin throwaway.

Scroll past enough 70s listings and polyester starts to feel like a punchline. Crackly, pilled, faded shirts that smell faintly of a basement. That reputation is earned, most of what survives from this era genuinely is low-grade. But "most" isn't "all," and the gap between a forgettable double-knit shirt and a genuinely collectible one comes down to specifics you can actually check before you buy.

Double-knit isn't the same fabric as polyester crepe or jersey

The phrase "polyester" covers a lot of different constructions, and they don't behave the same way or hold value the same way.

Fabric	Construction	Feel	Resale relevance
Polyester double-knit	Two sets of needles interlock two yarn layers into one thicker fabric	Heavy, structured, holds shape, doesn't curl at cut edges	Common in leisure suits and disco shirts; quality varies enormously by maker
Polyester crepe	Single-layer weave with a slightly textured surface	Lighter, more drape, less structure	Common in 70s blouses and dresses; pills and thins faster than double-knit
Polyester jersey	Knit similarly to cotton jersey but in synthetic fiber	Stretchy, clingy, lightweight	Used heavily by disco-era designers for body-conscious silhouettes

Double-knit is the fabric most associated with the leisure suit and the loud-print disco shirt, largely because its weight and stability made it useful for tailored, structured pieces in a way lighter polyester knits weren't. That same weight is also why a well-made double-knit piece from this era can still hold its shape decades later, while a crepe blouse from the same year has often gone limp and thin.

Three things that separate valuable vintage polyester from the rest

Weight and drape. Pick the garment up. Cheap double-knit feels stiff, almost cardboard-like, and hangs flat. A higher-quality piece is noticeably heavier in the hand but still moves with liquid drape when you let it fall, it doesn't fight your body. This is the single fastest tell, and it's something sellers can describe even when you can't touch the fabric yourself.
Print crispness and registration. Look closely at where colors meet in the pattern. On a well-printed piece, the edges between colors are sharp and the pattern repeats line up cleanly. On a cheap, mass-produced piece, you'll see blur, slight color bleed, or visible misalignment where the repeat doesn't quite match. This is a manufacturing quality issue, not an aging issue, so a clean scan or close-up photo tells you what you need to know before you buy.
Label and maker. An unmarked or generic department-store tag tells you nothing. A label from a known disco-era maker, like Nik Nik on shirts, or a designer with documented work in synthetic fabrics, signals that someone with a reputation to protect built the thing. Finished interior seams and an integrated lining (rather than an unlined, raw-edge interior) are construction tells that often go along with a real maker's label.

Which 70s designers worked seriously in synthetic fabric

A handful of American designers built real reputations on synthetics during this decade, and their vintage pieces now sell for meaningfully more than ordinary 70s polyester.

Stephen Burrows is the clearest case. He built his disco-era signature on matte jersey and color-blocked poly-blends, sewn with techniques built for stretch fabric, including his famous "lettuce hem." His vintage pieces show up regularly through specialty dealers and auction houses today, priced well above generic synthetic vintage.

Halston is the name people reach for first when they think of 70s glamour, but it's worth being precise about his materials. His most famous synthetic was Ultrasuede, a nonwoven polyester-and-urethane fabric engineered to mimic suede, not woven double-knit. His other signature material was matte jersey. Vintage Halston pieces on the resale market have sold across a wide range, from a few hundred dollars into the thousands, depending on the specific piece and its condition, which reflects how much his name alone moves resale value even outside double-knit specifically.

The disco revival is pulling demand back to this decade

Disco-era styling has cycled back into current fashion more than once, and each wave pulls renewed attention to the original garments rather than reproductions. A genuine 70s double-knit shirt has a print scale, sheen, and weight that's hard to replicate with current manufacturing, which is part of why buyers chase the originals specifically instead of settling for a modern throwback print.

Red flags that kill value even on a good label

A great label doesn't save a garment with real damage. Watch for sun-faded color, especially uneven fading that shows where a piece hung in a window or closet. Check underarms and collar points for snags, pulled threads, or pilling, since these areas take the most wear on knit fabric. And don't skip the smell test if you can, vintage polyester traps body odor and storage mustiness in a way natural fibers don't, and it's notoriously hard to fully remove even after washing.

None of that means walk away from every flawed piece, but it does mean those flaws should show up in the price, not just the description.

Sorting genuinely good 70s polyester from the bulk-bin version takes a closer look than most single listings give you. Crawli searches vintage clothing across Depop, Poshmark, eBay, Grailed, and Vestiaire at once, for free, so you can compare weight, print quality, and labels across multiple listings before deciding which one is actually worth it.