UA Alpine Explorer Boys' Short Sleeve

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?

Across Under Armour's jacket line, from lightweight woven shells to insulated ColdGear and rain shells, owners consistently report that the UA Storm water-resistant treatment performs well in real conditions: one reviewer said a ColdGear Infrared jacket kept them from needing a rain shell while it drizzled and called it 'very durable,' and a Storm Forefront rain-jacket owner said it 'keeps your dry, even during a heavy rainstorm.' Quality is generally praised as lightweight and well-made, but fit is inconsistent style to style: one woven jacket runs small enough a reviewer called their usual large 'a smaller large,' while a ColdGear jacket is reported to run 'a little on the large side.'

Strengths

Owners consistently praise the UA Storm technology's real-world water resistance and the lightweight, breathable feel of the shells.

Watch out for

Fit varies significantly by style, some jackets run small and others run large, so sizing isn't consistent across the line.

Sizing

A 6'2" reviewer found the Unstoppable Woven jacket's large fitting closer to a 'smaller large,' while a ColdGear Infrared Shield owner said it runs 'a little on the large side,' so checking the size guide per style is worthwhile rather than assuming a consistent fit.

About Under Armour's jackets & outerwear line as a whole. Sources: UA Storm ColdGear Infrared Shield 2.0 Men's Jacket | Under Armour · UA Unstoppable Woven Men's Jacket | Under Armour · UA Storm Forefront Men's Rain Jacket | Under Armour