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Rothco Thermal undershirt
Army Star Est. 2004
⭐4.3 / 5 on Trustpilot
30 dages fuld returret
Rothco Thermal Knit Underwear Top – Base Layer for Cold Conditions
Rothco Thermal Knit Underwear Top is designed as a functional base layer for cold climates. The close fit makes it ideal as the first layer under a jacket, fleece, or workwear, providing warmth, mobility, and comfort.Technical fabric and structure
This top features a circular knit construction with a distinctive waffle texture that creates small air pockets in the fabric. These pockets trap body heat effectively, maintaining a stable temperature during activity.Made from a blend of 55% cotton and 45% polyester, it combines the comfort of natural fibres with the strength and quick-drying properties of synthetics. The result is a soft, durable, and breathable fabric that keeps you warm and dry in cold weather.
Design and function
The classic crew neck and ribbed cuffs provide a secure, comfortable fit that keeps cold air out. The design allows a snug fit without restricting movement, making it perfect as a base layer in a layering system.For cold climates
Ideal for hunting, fishing, camping, skiing, or outdoor work in winter. Pair with matching Rothco Thermal Knit Underwear Pants for full protection from the cold.Rothco Thermal Knit Underwear Top is a dependable choice for anyone who values warmth, comfort, and functionality in cold environments.
For even colder conditions, see the heavier version here: Rothco Thermal Underwear Top – Heavyweight Version.
You can also find the matching bottoms here: Rothco Thermal Bottoms – Heavyweight Set for Extreme Cold.
This guide combines the manufacturer’s original American measurements with our estimated height and weight ranges to help you find the right size. The undershirt is designed for a snug fit. If you prefer a looser fit (for example, as a sweatshirt), we recommend choosing one size up.
| Size | Chest (inches) | Chest (cm) | Waist (inches) | Waist (cm) | Height (cm) | Weight (kg) |
|---|---|---|---|---|---|---|
| S | 34–36 | 86–91 | 30–32 | 76–81 | 160–170 | 55–68 |
| M | 38–40 | 97–102 | 34–36 | 86–91 | 168–178 | 69–80 |
| L | 42–44 | 107–112 | 38–40 | 97–102 | 175–185 | 81–92 |
| XL | 46–48 | 117–122 | 42–44 | 107–112 | 180–190 | 93–104 |
| 2XL | 50–52 | 127–132 | 46–48 | 117–122 | 185–195 | 105–118 |
| 3XL | 54–56 | 137–142 | 50–52 | 127–132 | 190–200 | 119–132 |
| 4XL | 58–60 | 147–152 | 54–56 | 137–142 | 195–205 | 133–145 |
The table below shows the product’s actual flat measurements. “½” indicates a half measurement (e.g., ½ chest). To find equivalent body measurements, multiply by 2. Use these if you want to compare with a shirt you already own.
HPS (High Point Shoulder) refers to the highest point on the shoulder, where the shoulder seam meets the neckline. Body length from HPS is measured vertically from this point to the bottom edge of the shirt at the front. It corresponds to what we call “total length from shoulder to hem”.
| Measurement | S | M | L | XL | 2XL | 3XL | 4XL |
|---|---|---|---|---|---|---|---|
| ½ Chest | 40.6 | 45.7 | 50.8 | 55.9 | 61.0 | 66.0 | 71.1 |
| Length from HPS | 66.7 | 68.6 | 70.5 | 72.4 | 74.3 | 76.2 | 78.1 |
| Shoulder Width | 36.8 | 41.9 | 47.0 | 52.1 | 57.1 | 62.2 | 67.3 |
| Sleeve Length | 57.8 | 59.7 | 62.2 | 63.5 | 65.4 | 67.3 | 69.2 |
| ½ Armhole | 21.6 | 22.9 | 24.1 | 25.4 | 26.7 | 27.9 | 29.2 |
| ½ Cuff Width | 7.6 | 8.3 | 8.9 | 9.5 | 10.2 | 10.8 | 11.4 |
- Perfect for outdoor activities in cold weather
- Material: 55% cotton / 45% polyester
- Circular waffle knit – enhanced thermal insulation
- Classic crew neck with ribbed cuffs
- Elastic wrist cuffs
- Snug fit – ideal as a base layer
- Available in multiple colours and sizes
Care instructions
- Machine wash 30–40 °C with similar colours.
- Do not bleach. Tumble dry low or air dry.
- Avoid fabric softeners to maintain moisture-wicking properties.
