4F Fleece-Unterwäsche

M
Delivered between Thu, 7.5. and Sat, 9.5.
Only 3 pieces in stock at supplier
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Colour2

Size3

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.

Key specifications

Target group
Men
Clothing size
M
Sleeve length
Long sleeves

General information

Item number
64937830
Manufacturer
4F
Category
Functional undershirts
Release date
7.11.2025

Colour

Colour
Black
Exact colour description
Black

Material

Upper
Polyester

Target group

Target group
Men
Age group
Adults

Clothing properties

Clothing size
M
Sleeve length
Long sleeves
Collar shape
Banded collar
Sport
OutdoorSkis
Season
AutumnWinter
Fabric properties
BreathableFast moisture transportFlat seamsHeat insulatingQuick drying
Fit
Regular fit

Origin

Country of origin
Poland

Voluntary climate contribution

CO₂ emissions
8.19 kg
Climate contribution
CHF 0.19

Scope of delivery

Multipack
Single pack

30-day right of return and free return shipment
24 Months Warranty (Bring-in)
1 additional offer

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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
  • 4F
    Not enough data
  • 1.Castelli
    0 %
  • 1.Dynafit
    0 %
  • 1.Forclaz
    0 %
  • 1.Gore Wear
    0 %

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
  • 4F
    Not enough data
  • 1.Odlo
    2 days
  • Castelli
    Not enough data
  • Craft
    Not enough data
  • Devold
    Not enough data

Return rate

How often is a product of this brand in the «Functional undershirts» category returned?

Source: Digitec Galaxus
  • 4F
    Not enough data
  • 1.Lenz
    4 %
  • 2.Heat Holders
    4.4 %
  • 3.Gore Wear
    5.5 %
  • 4.Craft
    6 %
Source: Digitec Galaxus