Technical activewear holds its value poorly, and that is a useful fact for a buyer rather than a problem. A garment that has been worn lightly and washed carefully is often close to new in every property that matters, and a garment that has been through a hot tumble dryer fifty times looks broadly similar on a rail while having lost the two things it was bought for. The gap between those two garments is where second-hand buying turns from a bargain into a mistake.
Sale stock carries a smaller version of the same risk. End-of-season discounts are usually honest reductions on the same garment, but they also coincide with supply-chain fibre changes and with garments that have been hanging, folded and handled in a shop for months. Knowing what a discount is actually buying is the same skill as judging a used item.
What a technical garment loses first#
Activewear is not one material but several mechanisms stacked in a single piece, and they age at different rates.
Recovery goes before strength. The elastane that gives a knit its snap fatigues with heat, chlorine and repeated cycling, and once it goes the garment is baggy at the knee, the seat and the cuff while the fabric itself is still sound. This is the most common and most consequential loss, and it is invisible in a photograph.
Wicking declines as the surface finish wears or becomes coated with detergent residue and fabric softener. The fibre is unchanged; the effect is gone.
Pilling appears at contact points, at the inner thigh, under the arm and along a waistband, where abrasion breaks fibres and they ball up on the surface.
Opacity falls as fabric thins. A legging that was acceptable when new can become translucent over a bent knee after a year of wear, and this change is hard to see except under stretch and light.
Everything else, in the form of holes, split seams and broken zips, is obvious.
Reading elastane fatigue#
Recovery can be tested in seconds, which makes it the first thing to check on any second-hand or deeply discounted stretch garment.
Take a section of the fabric between both hands and stretch it firmly across its width for two or three seconds. Release it and watch the return. Fabric with sound elastane contracts promptly back to its original dimensions. Fabric with fatigue stays expanded for a visible moment, or contracts part of the way and then stops. The slower the return, the more life the garment has already spent.
Repeat the test at the areas that work hardest. Pull the waistband sideways and check whether it returns to its starting length or stays flared. Do the same with a leg cuff and with a bra band or strap. A waistband that has relaxed is the single most common complaint about second-hand activewear, and it is not repairable in a bonded or knitted-in band.
Pilling, thinning and previous repairs#
Pilling is a symptom rather than a problem in itself. Pills form where fibres have been broken by abrasion, so the density and location of pills tell you how much friction the garment has seen and where. Heavy pilling on the inner thigh of a short means the fabric there has been worked hard and is likely thinner than the panels around it.
Hold the garment up to a light source and stretch it gently across the areas that will be under tension in wear. Thin patches, shiny spots and slightly lighter areas are all consistent with wear. A garment that goes translucent under a modest stretch will do so in a squat.
Repairs are worth looking for rather than ruling a garment out. A neatly restitched seam at a stress point is a reasonable sign, particularly if the stitch line is short and specific. A machine-darned patch over a thin area, an adhesive patch that has lifted at the edges, or a hem re-sewn with a visibly different thread are less encouraging, because they suggest that the fabric around them is also weak.
Check the zips and closures explicitly. A zip that runs roughly or separates behind the slider is at the end of its life, and replacing a zip in a bonded garment is often not economic.
Bands, waistbands and shape loss#
Bands and waistbands are where shape loss shows first and where it matters most, because they control fit.
An underband on a bra that has relaxed cannot be tightened beyond the adjustment built into the hook panel. A waistband with an encased elastic can sometimes be replaced, while a knitted-in or bonded band cannot. Compressive panels in tights and tops depend on the fabric’s modulus, so once the panel has relaxed the compression is gone even though the garment still fits loosely.
Lay a garment flat before buying and compare its two halves. Asymmetry between the left and right leg, or a waistband that has taken on a permanent curve, indicates that the garment has been worn in one configuration for a long time.
Seasonal fabric changes and how to judge a discount#
End-of-season sales are the most reliable source of genuinely good technical clothing at a lower price, and the discounts are attached to colourways, sizes and fabric revisions rather than to quality.
The complication is that many brands revise a fabric between seasons. A discounted top may be an earlier fabric with a higher elastane content, a different knit structure or a different finish from the current one. That is not automatically worse: a stable earlier fabric can be preferable to a lighter revision. It does mean the garment should be judged on its own construction, not on the reputation of a newer version.
The second complication is stock handling. Garments that have hung in a shop under lights and been tried on repeatedly show wear at the neckline, the underarm and the seams before they have been worn once. Discounted stock should be checked for the same markers as used stock, because shop handling is a mild version of the same abrasion.
The maths of a discount#
The useful comparison is cost per remaining session, not percentage off. A garment at half price with half its recovery spent has been bought at full price in real terms, and the more so where the property that is gone, compression or wicking, is the reason for the purchase at all.
A rough rule: a garment in excellent condition is worth most of its original price, a garment with mild pilling and intact recovery is worth a substantial discount, and a garment with relaxed bands or visible thinning should be passed over at any price, because the remaining life is short and unpredictable.
A checking routine for second-hand kit#
Work through the checks in this order, because the first failure makes the rest irrelevant.
- Stretch and release the fabric at the thigh, the upper arm and the waistband. Recovery is the deciding property.
- Hold it to the light and stretch gently across the seat, the knees and the shoulders.
- Run a hand over the inside of the seams at the inner thigh, the underarm and the strap line.
- Test every closure: zips, hooks, drawcords and elastic cuffs.
- Look at the label for fibre content and care instructions, since both predict how the remaining life will go.
- Ask about washing history where the seller can answer. Hot tumble drying and fabric softener are the two answers that matter most.
Where the answers are satisfactory, second-hand activewear is a sensible purchase. Where a seller cannot describe the garment’s fibre content or how it was washed, the price should reflect the uncertainty.