Description
Beat the cold with ease
Don't let the chilly weather ruin your comfort. The Flexorex thermal underwear will efficiently trap your body heat, keeping you warm.
Moisture-wicking
The fabric will draw sweat away from your skin, helping you stay dry and comfortable. This will prevent the risk of catching a cold.
Elastic
Our thermal underwear allows a full range of motion, perfect for any activity. You'll move freely and comfortably without feeling restricted.
Lightweight
You won't even notice you're wearing it.
Size guide
- To measure yourself:
- 1. Stand straight with your arms hanging naturally by your sides.
- 2. Wrap the measuring tape around the fullest part of your chest.
- 3. Start the measuring tape at the highest point of the shoulder and extend it down to the waist.
- 4. Place the measuring tape at the point where the sleeve begins and extend it down to the wrist.
| Size | Length | Bust | Sleeve | |||
|---|---|---|---|---|---|---|
| cm | inch | cm | inch | cm | inch | |
| L | 65 | 25.6 | 84 | 33.1 | 58 | 22.8 |
| XL | 67 | 26.4 | 88 | 34.6 | 59.5 | 23.4 |
| 2XL | 69 | 27.2 | 92 | 36.2 | 61 | 24 |
| 3XL | 70 | 27.6 | 96 | 37.8 | 62.5 | 24.6 |
- 1. Wrap the measuring tape around your waist and the fullest part of your hips.
- 2. Start the measuring tape at the top of the pant line and extend it down to the ankle.
| Size | Length | Waist | Hips | |||
|---|---|---|---|---|---|---|
| cm | inch | cm | inch | cm | inch | |
| L | 97 | 38.2 | 78 | 30.7 | 88 | 34.6 |
| XL | 99 | 38.9 | 82 | 32.3 | 92 | 36.2 |
| 2XL | 101 | 39.8 | 86 | 33.9 | 96 | 37.8 |
| 3XL | 103 | 40.6 | 90 | 35.4 | 100 | 39.4 |











Daniel Wright (verified buyer)
Perfect for winter, great fit and keeps the cold away. I appreciate how lightweight yet warm it is. It’s become my go-to winter wear for outdoor activities. Very impressed with the quality and design.
Emily Davis (verified buyer)
Keeps me warm all day!
Samantha Brown (verified buyer)
Warm and comfortable all day.
John Smith (verified buyer)
Excellent warmth and comfort, perfect for winter activities.
Michael Thompson (verified buyer)
The best thermal set I’ve purchased in years. It fits snugly and keeps the chill out. Ideal for my morning hikes in the cold. Definitely recommend it to anyone looking for quality thermal gear.
John D. (verified buyer)
Incredibly warm and comfortable, perfect for chilly days.
Sam L. (verified buyer)
These thermals are a game changer! The fabric is soft against the skin, and the fit is snug but not restricting. They’re now my go-to underlayer during the winter months, making outdoor activities more bearable.
Mike T. (verified buyer)
Fits perfectly and keeps me warm. Highly recommend!
Alex P. (verified buyer)
Good quality, though I wish it was slightly thicker.
Alex235 (verified buyer)
Keeps me warm in freezing temperatures. Highly recommend!
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Medical Disclaimer
Individuals' medical conditions vary, and the use of our products is not guaranteed to be 100% effective for everyone.
If you're dealing with clinical disease or chronic pain, please consult with your physician for medical advice regarding your medical condition.