4F Fleece-Unterwäsche
SOnly 3 pieces in stock at supplier
Colour2
Size2
Product details
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, making it 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.
- Material: fleece, with a soft structure on the inside, providing a pleasant feel and effective insulation.
- 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.
- Composition: high-quality polyester ensuring durability and quick drying; detailed percentage composition not provided in the manufacturer's description.
- Weight: medium thickness typical of thermal underwear; optimal for wearing as a mid-layer.
This model works perfectly as a mid-layer under a jacket during activities in cooler conditions, such as 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.
Target group | Men |
Clothing size | S |
Sleeve length | Long sleeves |
Item number | 64937816 |
Manufacturer | 4F |
Category | Functional undershirts |
Release date | 7.11.2025 |
Colour | Black |
Exact colour description | Black |
Upper | Polyester |
Target group | Men |
Age group | Adults |
Clothing size | S |
Sleeve length | Long sleeves |
Collar shape | Banded collar |
Sport | Outdoor, Skis |
Season | Autumn, Spring, Winter |
Fabric properties | Breathable, Fast moisture transport, Flat seams, Heat insulating |
Fit | Regular fit |
Pattern | Unicoloured |
Country of origin | Poland |
CO₂ emissions | 8.19 kg |
Climate contribution | CHF 0.19 |
Multipack | Single pack |
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Reviews & Ratings
Warranty score
How often does a product of this brand in the «Functional undershirts» category have a defect within the first 24 months?
Source: Digitec Galaxus- 4FNot enough data
- 1.Castelli0 %
- 1.Dynafit0 %
- 1.Forclaz0 %
- 1.Gore Wear0 %
Warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Digitec Galaxus- 4FNot enough data
- 1.Odlo2 days
- CastelliNot enough data
- CraftNot enough data
- DevoldNot enough data
Return rate
How often is a product of this brand in the «Functional undershirts» category returned?
Source: Digitec Galaxus- 4FNot enough data
- 1.Lenz4 %
- 2.Heat Holders4.4 %
- 3.Gore Wear5.5 %
- 4.Craft6 %

