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Under Armour Performance Tech 3Pk Low - white
(Product No.: OE-77-1379504-0100)
- Durable material wicks sweat
- dries really fast
- New Locked-In Fit design keeps sock securely on heel for an adjustment-free fit
- Medium cushioning throughout foot for comfort & protection
- Mesh panels on top of foot for added breathability
- Built-in arch support helps reduce foot fatigueWash garment inside out
- Machine wash cold on gentle cycle with like colors
- Do not bleach
- Reshape & dry flat
- Cool iron with cover if needed
- Do not dry clean
- 3 pairs of socks
- 98% Polyester/2% Elastane
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Under Armour Size Chart
Fit-und-Warm carries a broad Under Armour assortment of apparel, footwear and accessories for women, men and children: base layers, gloves, hoodies, pants, jackets, headwear, shoes, socks, T-shirts, bags and backpacks.
Men's Tops
| Size | Chest (cm) | Waist (cm) |
|---|---|---|
| XS | 79–86 | 71–74 |
| S | 86–94 | 74–79 |
| M | 94–104 | 79–86 |
| L | 104–112 | 86–94 |
| XL | 112–122 | 94–104 |
| XXL | 122–132 | 104–116 |
| 3XL | 132–142 | 116–127 |
| 4XL | 142–152 | 127–138 |
| 5XL | 152–163 | 138–150 |
CM values were mathematically converted from Under Armour's official inch chart using 1 inch = 2.54 cm and sensibly rounded.
Women's Tops
| Size | Chest (cm) | Waist (cm) |
|---|---|---|
| XXS / 00 | 79–83 | 62–65 |
| XS / 0–2 | 83–85 | 65–68 |
| S / 4–6 | 85–91 | 68–74 |
| M / 8–10 | 91–96 | 74–79 |
| L / 12–14 | 96–104 | 79–86 |
| XL / 16 | 104–112 | 86–94 |
| XXL / 18 | 112–119 | 94–102 |
| 3XL / 20 | 119–127 | 102–109 |
Boys' Apparel
| Size | Chest | Waist | Hip | Height (cm) |
|---|---|---|---|---|
| YXS / 7 | 63–66 | 58–61 | 66–69 | 119–128 |
| YSM / 8 | 66–69 | 61–63 | 69–71 | 128–135 |
| YMD / 10–12 | 69–74 | 63–69 | 71–79 | 135–150 |
| YLG / 14–16 | 74–83 | 69–76 | 79–86 | 150–165 |
| YXL / 18–20 | 83–90 | 76–84 | 86–94 | 165–178 |
Men's Shoes
| US | Foot length (cm) | EU | UK |
|---|---|---|---|
| 7 | 25 | 40 | 6 |
| 7.5 | 25.5 | 40.5 | 6.5 |
| 8 | 26 | 41 | 7 |
| 8.5 | 26.5 | 42 | 7.5 |
| 9 | 27 | 42.5 | 8 |
| 9.5 | 27.5 | 43 | 8.5 |
| 10 | 28 | 44 | 9 |
| 10.5 | 28.5 | 44.5 | 9.5 |
| 11 | 29 | 45 | 10 |
| 11.5 | 29.5 | 45.5 | 10.5 |
| 12 | 30 | 46 | 11 |
| 12.5 | 30.5 | 47 | 11.5 |
| 13 | 31 | 47.5 | 12 |
| 13.5 | 31.5 | 48 | 12.5 |
| 14 | 32 | 48.5 | 13 |
| 14.5 | 32.5 | 49 | 13.5 |
| 15 | 33 | 49.5 | 14 |
| 15.5 | 33.5 | 50 | 14.5 |
| 16 | 34 | 50.5 | 15 |
Women's Shoes
| US | Foot length (cm) | EU | UK |
|---|---|---|---|
| 5 | 22.5 | 35.5 | 3 |
| 5.5 | 23 | 36 | 3.5 |
| 6 | 23.5 | 36.5 | 4 |
| 6.5 | 23.5 | 37.5 | 4.5 |
| 7 | 24 | 38 | 5 |
| 7.5 | 24 | 38.5 | 5.5 |
| 8 | 24.5 | 39 | 6 |
| 8.5 | 25 | 40 | 6 |
| 9 | 25.5 | 40.5 | 6.5 |
| 9.5 | 26 | 41 | 7 |
| 10 | 26.5 | 42 | 7.5 |
| 10.5 | 27 | 42.5 | 8 |
| 11 | 27.5 | 43 | 8.5 |
| 11.5 | 28 | 44 | 9 |
| 12 | 28.5 | 44.5 | 9.5 |
Kids / Youth Shoes
Under Armour publishes a separate kids footwear chart using US Youth, US Women, CM, Euro and UK. For FuW kids' footwear, use that product-specific Under Armour kids chart; do not transfer adult conversions.
Boys' Socks
| Sock size | US Youth | EU |
|---|---|---|
| 0–6M | 0K–2K | up to 17.5 |
| 6M–12M | 2K–4K | 17.5–19.5 |
| 12M–24M | 4K–7K | 19.5–23.5 |
| 2–4T | 7K–10.5K | 23.5–27.5 |
| 4–6 / XS | 10.5K–13K | 27.5–31 |
| S | 13.5K–4.5 | 31.5–36.5 |
| M | 4.5–7 | 36.5–42 |
Fits
| Fit | Description |
|---|---|
| Tight | Snug without compression squeeze. |
| Fitted | Close to the body for a streamlined feel. |
| Regular | Classic, neither tight nor loose. |
| Relaxed | Generous fit with room to move. |
Assortment check: Fit-und-Warm Under Armour brand page. Manufacturer sources: official Under Armour Size & Fit Guides for Men, Women, Boys, Footwear and Socks. Research checked on 20 August 2026.