Most writing about polewear care is about making it last longer. This is about the other end: how to tell when a pair is finished, and what "finished" even means for a garment whose entire function depends on a fiber that degrades invisibly.
The short version is that stretch garments rarely fail the way other clothes fail. A cotton shirt tells you it is done by tearing. A pair of pole shorts tells you it is done by quietly stopping doing its job while still looking fine on a hanger, which is why so many dancers keep wearing a pair long past the point it has stopped holding them in place.
Is there an actual lifespan for a stretch garment?
Not one anybody has established rigorously, and it is worth being straight about that rather than repeating a number as though it were settled.
What exists is trade guidance. The fabric supplier SpandexByYard, writing about the lifespan of spandex garments, puts a well-made piece at "2 to 3 years of regular, consistent use (1-2 times per week)" and at "100+ wears while still retaining its original shape and performance," with low-quality garments possibly lasting "only a dozen wears." Those are the supplier's own figures. The page does not cite a study, a standard, or a test method behind them, and no temperature thresholds or wash counts appear anywhere on it.
Treat that as a reasonable order of magnitude and nothing more. A number like "100 wears" is a useful mental anchor precisely because it is lower than most people assume and higher than a bad pair will manage. It is not a spec, and any brand quoting a hard lifespan for a stretch garment is telling you about its confidence rather than about the fiber.
There is also a reason a firm number is hard to produce honestly. Wear counts are not the variable that matters most. Two pairs worn the same number of times, one washed cold and air dried and one left damp in a bag and tumbled hot, are not the same age in any sense the fabric recognizes.
What is actually breaking down?
Elastane is the part that ages. It is the small percentage of the blend doing all the stretch and, more importantly, all the recovery, and it is the component that degrades first while the nylon or polyester around it is still structurally fine.
The clothing manufacturer Modaknits describes the mechanism as fibers that "break down due to repeated washing, heat exposure, stretching, sweat, body oils, and harsh detergents," and goes into a few of those specifically. On sweat and skin: "Sweat contains salts and acids that weaken elastane fibers when repeatedly absorbed into fabrics. Similarly, body oils stick to fibers, attracting dirt and bacteria, accelerating fiber breakdown." On heat: "High heat breaks down the chemical bonds within elastic fibers, causing permanent damage. Dryer heat exacerbates the problem, accelerating fiber deterioration." On detergent: "Harsh detergents further damage elastane, stripping away protective coatings."
That page, like the supplier one, offers no figures and cites no studies. What the two agree on is the shape of the problem, and the shape is the useful part: the damage is cumulative, it is chemical as well as mechanical, and the conditions that cause it are exactly the conditions polewear is used in. A garment worn against sweaty skin, stretched to its limit repeatedly, and washed often is being aged by every part of its normal use.
This is also why polewear ages faster than the same fabric in another application. A pole class puts more extreme stretch through a smaller garment, with more skin contact and more sweat per square inch of fabric, than almost anything else you could do in the same knit.
What are the signs a pair is done?
These are the practical ones, roughly in the order they show up.
It does not spring back. The defining symptom. Stretch the leg opening or the waistband and let go. A healthy garment returns to its original dimension immediately and completely. A tired one returns slowly, or returns to something slightly larger than where it started. This is recovery loss, and it is the failure that matters most, because recovery is what holds a garment in position.
It has started migrating when it did not before. A waistband that rolls, a leg opening that creeps, a garment that needs adjusting mid-class when the same pair used to stay put. People almost always read this as a fit change in themselves. Sometimes it is. Often the garment has simply lost the recovery that was holding it.
It goes sheer under stretch. Hold it up to a light in its stretched state rather than relaxed. Thinning shows there first, and a pair that is opaque flat and translucent stretched has thinned to the point where it is no longer doing the coverage half of its job, whatever it looks like folded.
The fabric has changed hand. Grip and contact fabrics are meant to have a specific surface feel. When that surface has been abraded by the pole or coated by residue from detergent, softener or lotion, it stops behaving the way it did. Grip fabric that has gone slick is finished as grip fabric even if the garment is otherwise sound.
The seams have outlived the fabric. On a well-made garment the seams are frequently the last thing standing. Puckering along a seam, or a seam that now stands proud of fabric that has relaxed around it, is a sign the panels have stretched out and the stitching has not.
What should you do with a pair that is past it?
Demote it rather than bin it, where that makes sense. A pair with recovery loss but no transparency is often still perfectly good for conditioning at home, for warm-ups, or for floorwork classes where it is not being asked to stay in place through an inverted trick. What it should not be is the pair you wear to perform in or to learn a new invert in, because both of those depend on the garment staying exactly where you put it.
The pairs that should actually be retired are the ones that have gone sheer under stretch and the ones whose grip surface has gone. Neither problem is recoverable, and neither is visible in the drawer.
One habit makes the whole judgment easier: notice when a pair is new. Stretch it, feel the surface, note how fast it snaps back. That is your reference point, and it is the thing nobody has when they are trying to decide two years later whether a garment has changed or their memory has.