
Helikon-Tex Underwear Top US LVL 1 Black
Item no.: BL-UN1-PO-01-BXX
Availability: Pick an option
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Description
Lightweight Thermal Shirt for Dynamic Operations
The Helikon-Tex Underwear Top US LVL 1 is designed as a multifunctional thermoactive base layer, suitable both as the first layer under tactical clothing and as a standalone shirt in warm environments. Weighing just 167 g and with a fabric weight of 130 g/m², it combines outstanding breathability, moisture management, and lightness. It offers protection against overheating, UV exposure, and abrasion – making it an essential part of any modern layering system.
Material Characteristics – Helikon-Tex Quick Dry Knit
Made from 100% polyester using the proven Helikon-Tex Quick Dry structure, this shirt ensures excellent air circulation and rapid drying. Its fiber design efficiently wicks moisture away from the skin, keeping the body dry even during intense physical activity. The material is lightweight, abrasion-resistant, and dimensionally stable, maintaining its performance during extended operations in rugged terrain. Flat seams reduce friction and maximize comfort under gear and outer layers.
Thermoactive Performance
The US LVL 1 shirt is engineered for active temperature regulation. During movement, it disperses heat and moisture outward, while maintaining a comfortable core warmth in rest phases. Its excellent breathability ensures stable body climate, effectively preventing both overheating and cooling – especially useful in transitional weather or variable activity levels.
Operational Application
The US LVL 1 Top excels during long-range movements, trekking, training, or daily duty as a reliable next-to-skin layer. It protects against direct sun exposure, reduces friction from gear, and remains comfortable even under tactical vests or backpacks. Its easy-care construction makes it especially suitable for extended missions where performance and comfort are critical.
- Weight: 167 g
- Material: 100% polyester (Helikon-Tex Quick Dry Knit)
- Fabric weight: 130 g/m²
- Product line: Outback
- Thermoactive: regulates body temperature during fluctuating activity
- Breathable: promotes airflow and heat dissipation
- Quick-drying: significantly faster drying than traditional fabrics
- Seam design: flat seams to reduce friction
- Fit: ergonomic and close to the body for effective moisture control
- Use case: base layer for warm to temperate climates
US LVL 1 vs. US LVL 2 – Which Base Layer Fits Your Mission?
Helikon-Tex offers two functional long-sleeve shirts – the US LVL 1 and the US LVL 2 – each tailored for specific environmental conditions and operational demands:
- US LVL 1 is the ideal lightweight base layer for warm to moderate climates. With its low weight, high breathability, and UV protection, it's perfect for summer patrols, physical training, or active movement under sustained conditions.
- US LVL 2 is the go-to option for cold or variable weather. It provides additional insulation, a close ergonomic fit, and a 1/4-length zipper for precise thermal and moisture control – ideal for alpine missions, winter operations, or bivouac use with lower physical output.
Both shirts are thermoactive, quick-drying, and optimized for layering systems – the key factor is the ambient temperature and level of physical exertion during the operation.
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Attributes
Color: Black
Material: 100% Polyester
Weight: 167 g
Type / Function: Functional clothing, Long sleeve
Brand: Helikon-Tex
Model: UnderwearTopUSLVL1
Sex: Men -
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Product safety
Manufacturer information:Entire M sp. z o.o.
Email:
Radomska 34
54-032 Wrocław
Poland (PL)
Phone: +48 71 769 45 90
Web: www.helikon-tex.com
[email protected]
Responsible person:Entire M sp. z o.o.
Email:
Radomska 34
54-032 Wrocław
Poland (PL)
Phone: +48 71 769 45 90
Web: www.helikon-tex.com
[email protected]