Rothco

Rothco Heavyweight Thermal Undershirt White

Name: Rothco Heavyweight Thermal Undershirt White
Brand: Rothco
SKU: 6448

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As low as EUR 35.99

Army Star Est. 2004

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Description

Raschel Knit Heavyweight Crew – Military Issue Undershirt

Military-grade quality for extreme conditions

The Raschel Knit Heavyweight Crew from Indera Mills is developed to military standards and issued as official Military Issue thermal underwear in the United States. It is engineered to deliver maximum warmth and insulation in extreme cold, where reliability and durability are essential.

Technical fabric with superior insulation

This undershirt is made from heavyweight raschel knit – a special knitting technique that creates small air pockets within the fabric. These pockets trap and retain body heat while allowing breathability, resulting in a garment that is both durable, flexible, and comfortable for long-term wear.

Designed for active use in cold environments

Set-in sleeves provide excellent freedom of movement, while the rib-knit collar and cuffs effectively keep out cold air. The tagless design prevents neck irritation, and the shirt can be worn directly on the skin as a base layer or over a light T-shirt for added comfort.

For work and leisure in extreme cold

The Raschel Knit Heavyweight Crew is ideal for both outdoor recreation and professional use – from hunting, fishing, and skiing to military, security, and emergency service operations. Rated for extreme cold and medium activity, it’s a dependable choice when warmth and endurance matter most.

Easy care

Machine wash warm with like colors. Use only non-chlorine bleach. Tumble dry on low and remove promptly. Low iron if needed.

About the manufacturer – Indera Mills

Founded in 1914 in North Carolina, USA, Indera Mills is one of the country’s oldest and most respected manufacturers of thermal underwear. With over a century of textile expertise, the company combines traditional craftsmanship with modern innovation. Each garment carries the legacy of authentic American military quality – made to perform, last, and keep you warm.

Size Guide

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