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UA Train Seamless Women's Long Sleeve

Name: Under Armour UA Train Seamless Women's Long Sleeve
Brand: Under Armour
SKU: under-armour-ua-train-seamless-women-s-long-sleeve-1379150-348
Price: 42.97 USD

T-Shirts

$43

The verdict

A solid buy at $42.97 for a seamless training long sleeve, especially if chafing from seams bothers you.

Fit

Seamless knits fit close and stretch to the body; most should take their usual size, and the fabric forgives being between sizes.

Quality

Seamless construction at this price is usually well executed by this brand — no chafe points and good shape retention — though seamless knits can snag if worn under packs.

Price check

$42.97 is reasonable mid-tier pricing for seamless construction, which normally commands a small premium over cut-and-sew tops.

Best for

Someone who trains long sessions and wants a smooth, chafe-free layer for gym or cool-weather runs.

Care

Wash cold on gentle and lay flat to dry; keep it away from velcro and rough surfaces to avoid snags.

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Fit check: Under Armour

True to size

Under Armour's everyday lines fit true to size with a deliberately roomy, athletic-loose cut rather than a tailored one.

Owner reviews of the core Rival Fleece hoodies and joggers repeatedly land on "true to size," with the cut described as loose and comfortable rather than baggy — several hoodie owners say to size down only if they want a trimmer fit. Sizing guides likewise report the brand fits true to your usual size once you pick the right cut, since Under Armour labels pieces by cut (loose vs. fitted vs. compression) and the fitted and compression styles are intentionally much snugger than the casual gear. Reviewers note the tees and tops run long and boxy rather than fitted, and a minority of jogger buyers found the slimmer athletic cuts snug enough to size up.

Sizing advice: Order your usual size in the casual fleece, tees, and joggers — size down only if you want a closer fit in the roomy cuts, and expect the fitted/compression-labeled styles to run much snugger by design.

Per owner & reviewer reports: Under Armour Rival Fleece Hoodie Reviews — Zappos · Under Armour Rival Fleece Joggers Reviews — Zappos · Under Armour sizing guide — OPUMO Magazine

What's my size at Under Armour?

What owners report about Under Armour t-shirts

Under Armour's Tech t-shirt line uses lightweight 100% polyester with overlock-stitched seams. Reviewers who wash-and-wear test it report the fabric holds up well over repeated washes, staying breathable without losing shape. The recurring complaint isn't failure but comfort: the overlock seams can feel abrasive on high-mileage runs, and odor control is described as good but not excellent after multiple wears. Fit runs on the loose, relaxed side, boxy rather than tailored, enough that some owners size down from their usual size for a closer cut.

Strengths: Reviewers consistently note the fabric holds up wash after wash without breaking down, staying breathable and lightweight through repeated wear.
Watch out for: The recurring complaint is the overlock-stitched seams, which some runners find abrasive on longer, high-mileage outings, plus odor control that testers rate good but not excellent.
Sizing: The line runs loose and boxy rather than fitted; some owners size down from their usual size for a closer fit.

About Under Armour's t-shirts line as a whole. Sources: Under Armour Tech 2.0 Review | Tested & Rated - GearLab · Under Armour UA Tech Loose Fit Tshirt Review - CoachLevi.com · Under Armour Tech T-Shirt Review (2025): Comfortable & Durable