Helikon-Tex US LVL 1 Black thermal underwear - set

S... Review confirmed by purchase

100%

04.10.2026

Review for model:

Size: S

I have been using this set for a long time and I am very satisfied with it. The underwear is comfortable, fits the body well, and effectively wicks away moisture, so there is no feeling of dampness. The material feels pleasant to the touch and does not irritate the skin.

J... Review confirmed by purchase

100%

23.10.2026

Review for model:

Size: XL

Comfy thermals that are long enough in the arms! I was warm overnight in these on a -1C trip. Nice material that washes well and is not itchy or static-feeling. Helikon are a great brand; I have many products from them, and it's now my go-to for new kit. Cheers militayEU, great service as usual.

F... Review confirmed by purchase

80%

08.10.2026

Review for model:

Size: L

Overall, everything is fine, although the sleeves are a bit too short in my opinion (unless that’s just because I have long arms). It’s still usable, but the thumb holes are completely impractical, because to use them you have to stretch the sleeve very tightly. Other than that, the rest is flawless: comfortable, quite warm, and wicks moisture well.

P... Review confirmed by purchase

100%

01.07.2026

Review for model:

After a few trips out in the field, I can say that this set does its job excellently. It effectively wicks away sweat and even during greater exertion, you don't feel moisture on your back. The material is light, pleasant to the touch, and doesn't cause chafing thanks to the flat seams. The size matches the chart – I wear L at 192 cm tall and 90 kg. On colder days, it works perfectly as a first layer.

Good breathability of the thermal underwear, you can't feel it on your body, although it retains warmth, you can feel the quality. Matches the size. The seams are even, high-quality, and correspond to its value. It does not restrict movement.

G... Review confirmed by purchase

100%

28.04.2026

Review for model:

Good underwear, it really retains body heat well and wicks away sweat optimally. The fabric could be a bit more durable, then it would be almost perfect. I can recommend it.

O... Review confirmed by purchase

80%

22.04.2026

Review for model:

The fabric is very pleasant to the touch and keeps warmth well. I recommend choosing a larger size, as the sleeves and legs are too short according to the sizing chart. Unfortunately, the material is not very durable, it pills easily, and even a small snag, for example on velcro, can damage it. I have the impression that Helikon has neglected the quality of their products – this is yet another of their items where I am disappointed with the material's durability.

W... Review confirmed by purchase

100%

30.03.2026

Review for model:

Compared to Mon thermal underwear, this is a completely different level. The Helikon product regulates airflow excellently. With moderate activity, it serves as a thermal layer, while during increased movement, it does a great job of wicking away moisture and heat, which greatly improves comfort. It is also very comfortable to wear and does not restrict freedom of movement. However, it should be remembered that this is a first layer level, so with temperatures around zero additional insulation is necessary. The following sets worked well for me: at about 5°C with wind – Helikon lvl1, regular shirt, sweatshirt, and pants; while walking, the temperature was ideal, and during stops, I put on a gore-tex jacket. And at about -5 to -10°C in the snow – Helikon lvl1, sweatpants, sweatshirt, and a light down jacket worked great for moderate activity. In summary, both solo and as a part of winter clothing sets, Helikon performs excellently and costs reasonable money. I definitely recommend it.

K... Review confirmed by purchase

100%

22.01.2026

Review for model:

The Helikon US LVL 1 Black thermal underwear set works great during evening walks with the dog in autumn and winter, but it also serves its purpose well in summer. The only drawback is that the seams on the sleeves can sometimes irritate the skin, and the long johns are a bit too loose.

K... Review confirmed by purchase

100%

04.01.2026

Review for model:

I am very satisfied with the purchase. The product itself works well, but when used with additional layers, it works even better. It holds heat very well and wicks moisture away. Unfortunately, after a few weeks of use, threads started sticking out.

The price matches the quality, although sometimes there are promotions. The product is well made, the material does its job well and really dries quickly. The size matches the one from the chart. When combined with LVL 2, it provides warmth during winter.

The underwear is fine, the size matches as well, but I have concerns about the packaging. It was packed in ordinary bags; I expected a gift, but did not receive any box. The description does not mention the lack of elegant packaging, and it should be nicer. Because of this, I have mixed feelings.

Unlike other opinions, with a height of 183 cm and 74 kg, size M was too tight for me, which made squatting difficult and caused discomfort at the seams under the arms. The material is very light, but suitable for cooler days.

Comfortable and performs its job perfectly, especially during winter outdoor workouts. Washes well. I recommend it – Helikon quality.

No need to prolong – Helikon has repeatedly shown that it is one of the best and most reliable manufacturers. As a second layer, I have a random level 2 polyester and a uniform – comfortable up to 9°C. You don’t feel the wind, moisture is wicked away.