The Under Armour Storm Midlayer ½ Zip is a men's performance sweatshirt engineered for cold-weather training and golf. Built from mid-weight ColdGear® fabric with hollow-fibre construction, it delivers meaningful warmth without the weight or bulk of traditional outerwear. The UA Storm finish repels light rain and drizzle while keeping the fabric fully breathable, making this mid-layer an ideal companion for unpredictable conditions on and off the course.
UA Storm is Under Armour's signature water-repellent fabric treatment. Rather than a coating that clogs the weave and traps heat, Storm works at the fibre level — rain and drizzle bead up and roll off the surface instead of soaking in. Crucially, the treatment preserves the fabric's natural breathability, so moisture from perspiration can still escape. The version used in this mid-layer is fluorine-free, making it a PFC-free, environmentally conscious choice without any compromise in wet-weather performance.
ColdGear® is Under Armour's cold-weather fabric system, designed to keep you warm, dry, and light when the temperature drops. The mid-weight version used here features a dual-layer construction: the inner face is soft and brushed to trap warmth against the skin, while the outer face is smooth and quick-drying to resist moisture and allow layering beneath a shell. This intelligent two-sided structure means you get the warmth of a fleece without the weight penalty of a traditional knit sweatshirt.
The fabric is constructed using hollow polyester fibres — each individual fibre has a hollow core that acts as an insulating air pocket. This engineering principle delivers meaningfully more warmth per gram than solid fibres, which means the garment stays lightweight and compressible while providing cold-weather insulation well above its apparent weight class. The result is a mid-layer that packs down easily, moves freely, and keeps you genuinely warm when autumn temperatures fall.
The 88% polyester / 12% elastane blend gives the fabric four-directional stretch — horizontally, vertically, and on both diagonals. For golfers, this is particularly important: the fabric moves with the body through the full arc of a golf swing without restricting the shoulders, back, or arms. For everyday athletic use, 4-way stretch means you can run, bend, and reach without the pull or bind typical of non-stretch mid-layers. The stretch recovers fully, so the garment retains its shape wash after wash.
| Style Number | 1377398-504 |
|---|---|
| Colour | Grove Green |
| Gender | Men's |
| Fit | Loose – fuller cut for complete comfort |
| Fabric | Mid-weight ColdGear® with soft brushed interior and smooth fast-drying exterior |
| Material Composition | 88% Polyester, 12% Elastane |
| Technology | UA Storm (fluorine-free water-repellent treatment), ColdGear®, 4-Way Stretch |
| Closure | Generous ½ zip front |
| Water Repellency | Yes – UA Storm, PFC-free treatment |
| Available Sizes | S, M, L, XL, XXL |
| Care Instructions | Machine wash cold with like colours; wash and dry zipped up; wash inside out; tumble dry low; do not iron; do not use fabric softeners; do not dry clean |
| Size | XS | S | M | L | XL | XXL | 3XL | 4XL |
|---|---|---|---|---|---|---|---|---|
| Chest (cm) | 76–81 | 86–92 | 96–102 | 106–112 | 116–122 | 127–132 | 137–142 | 147–153 |
| Waist (cm) | 67–70 | 72–76 | 80–85 | 89–94 | 99–104 | 109–116 | 121–127 | 132–138 |
| Hips (cm) | 81–84 | 86–90 | 94–98 | 102–107 | 112–117 | 122–127 | 132–137 | 142–147 |
Values are approximate guidelines only. Source: underarmour.com size chart.
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