Under Armour Activewear Sets Resale Value

Under Armour activewear sets: price by condition

Seller-declared grades, sterling with an approximate US dollar equivalent at £1 ≈ $1.33 (July 2026). What each grade means.

What holds its value across Under Armour

• HeatGear and ColdGear pieces with the stretch intact, which is the technology people are actually buying
• Team and licensed kit, which has a following beyond ordinary sportswear
• Larger sizes, which are consistently harder to find second hand than small ones
• Outerwear and gilets, which cost more new and hold value better than base layers

What pulls Under Armour resale value down

• Stretched-out compression garments, where the elastane has given and the fit has gone — which is the whole point of the product
• Pilling on the smooth technical fabrics, which shows badly and cannot be removed without damaging the surface
• Persistent odour in synthetic base layers, which holds in the fibres and is difficult to wash out completely
• Cracked printed logos, which is how the graphics on technical fabric eventually fail

Identifying and dating yours

1. The interior label names the fabric technology, which is what buyers search for rather than the garment type
2. Stretch the garment and let it go on camera if you can, since recovery is the honest measure of whether it still works
3. Photograph the underarm and inner thigh areas, which are where pilling and thinning show first

What lifts any activewear set, whatever the label

Activewear is heavily supplied second hand, so brand and fabric integrity are what separate a sale from a listing that sits.

• Recognised activewear brands with a following
• Fabric with no pilling or transparency when stretched
• Intact waistbands with working elastic
• Complete matching sets

And what pulls one down

• Pilling between the thighs, very common
• Fabric that goes sheer when stretched
• Perished waistband elastic
• Unbranded sets, which sell for very little

Working out what yours is worth

1. Stretch the fabric against the light to check opacity
2. Inspect the inner thigh area for pilling
3. Confirm both pieces match in size and colour

What to state in the listing

• Brand and specific product line
• Sizes of both pieces, stated separately
• Fabric composition, and whether opaque when stretched
• Any pilling on the inner thigh, and seam condition

Brand, line and both sizes: “Gymshark Vital Seamless Set, Top S Leggings S, Sage”. Brand line names are searched exactly in activewear. State both sizes and confirm it is a genuine matching set.

Preparing and photographing it

1. Check the top and bottoms are genuinely matching, same brand line and same colour batch.
2. Test the fabric for opacity when stretched, and check the waistband and seams.
3. Note both sizes separately and the brand’s style names if they have them.

1. Both pieces laid out together
2. The fabric stretched over a hand, showing opacity
3. Both size and composition labels
4. Seams, waistband and any pill, mark or pull

When it sells best, and handing it over

Steady with a strong January lift and a spring bump. Recognised activewear brands sell within days.

Light and cheap to post. Wash both pieces before sending and say so — on used activewear that single sentence resolves the buyer’s main hesitation, and it costs you nothing but a wash cycle.

What buyers ask

How do I know if compression kit is worn out?

Stretch it and see whether it snaps back. If it stays loose the elastane has gone, and the garment no longer does what it was bought for.

Can odour be washed out of synthetic sportswear?

Sometimes, with a proper technical wash and no fabric softener. If it persists after that, say so — buyers would much rather know in advance.

How much is an Under Armour activewear set worth?

Roughly £16 to £58 depending on condition, against £15 to £55 for activewear sets generally. The identification points above are what move a listing to the top of that range.

What the fees would take elsewhere

At the mid-range £37 for an Under Armour activewear set, against what the commission marketplaces would deduct:

Seller-side rates verified 26 Jul 2026, percentages only — the per-order and processing charges those platforms add are excluded, so the real gap is wider.

Listing is free and there is no commission — read how to sell an activewear set for the title, handover and timing, or the general activewear set value guide if yours is not an Under Armour.

See also: all Under Armour value guides · value guides by brand · buying an activewear set · Clothing · condition grades.