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Thermal fleece underwear - men's 4F top with 4FWarm insulation

This men's fleece top from the 4F thermal underwear collection was created for active men who need effective thermal insulation in colder conditions. The soft fleece material ensures comfort and freedom of movement, perfect as a mid-layer during training, winter walks, or everyday use in the off-season.

CHARACTERISTICS:

• Cut – regular, fitted enough to hold the layer under the jacket well, without restricting movement.
• Intended use – mid-layer or stand-alone sweatshirt in the transitional season; ideal for outdoor training, winter sports or colder days.
• Technology – 4FWarm – a special material construction that supports thermal insulation while maintaining comfort. :contentReference[oaicite:1]{index=1}
• Material – fleece, with a soft structure on the inside, providing a pleasant feel and effective insulation. :contentReference[oaicite:2]{index=2}
• Hydrophobic coating – slows the absorption of slight moisture, helping to maintain thermal comfort even during light activity in cooler, humid air.
• Functional details – a stand-up collar with a zipper protects the neck from cold, flatlock seams minimize chafing, and elastic cuffs and hem. :contentReference[oaicite:3]{index=3}
• Composition – high-quality polyester ensuring durability and quick drying; detailed percentage composition not provided in the manufacturer's description. :contentReference[oaicite:4]{index=4}
• Weight – medium thickness typical of thermal underwear; optimal for wearing as a mid-layer. :contentReference[oaicite:5]{index=5}

This model works perfectly as a mid-layer under a jacket during activities in cooler conditions—e.g., running, trekking, or skiing—but can also be worn on its own on everyday, cooler days. The black color provides a versatile look, easily paired with thermal pants or sweatpants.

Check also: men's sweatshirts , men's trousers , 4FWarm