New SS'26 Collection
4F Technologies
Others
Bloom Mode
Balance. Renewal. Freedom.
Waterproof jackets
Sweatshirts & sweatpants
In Motion
Activity. Functionality. Style.
Polo shirts
Move outside
Relax. Dynamics. Outdoor.
Tracksuits
Enjoy the Outdoors
Adventure. Comfort. Energy.
Yoga Studio
Movement. Breath. Harmony.
Running after dark
– products with reflective elements
Merino clothing
Trekking shoes
Gym shoes
Children's shoes
Sale hits
The best bargains of the season
Shoes
Luggage
Current price
The lowest price in the last 30 days before the reduction
Primary price
Size
Winter sports require solutions that work in changing weather conditions and allow full freedom of movement, and this is it. As a result, the brushed underwear offers high thermal insulation and thermal comfort for long hours on the slopes and for your favourite everyday activities on cold days.
It has a regular cut that fits comfortably to the figure and a standard hip length. Made from a double layer knit with a warm combed inside and a smooth outside. It is comfortable and soft to the touch.
It works best as a second layer, worn directly over a thermal t-shirt, for example, or under a jacket, especially on cold, chilly days.
The thermal underwear is made from a synthetic material for durability and easy care. The addition of elastane (10%) gives the fabric a slight stretch and a comfortable fit.
Boys' thermal shirt with 4FWarm technology for thermal comfort and to help maintain a constant body temperature. Collar neckline with zip fastening with zip lock. Raglan sleeves for greater freedom of movement.
Our guidance: What is closest to the skin? A word on sports underwear
Get to know sport inside out
Check all entries
Exercises for seniors – a safeway to improve your fitness every day
What should you wear when it’s cold in the morning but warm later on?
Technologies in trekking clothing – the new 4F spring-summer 2026 collection
Calf exercises that really work – training at home and at the gym
Bloom Mode – blossom at your own pace
How to dress for winter cycling – a practical guide
Nature's Trail - the adventure begins where the asphalt ends
Move Outside - go outside, breathe, discover. The new 4F collection for girls
How to dress a child for skiing? Clothing with the Grow-up system
4F Enjoy the Outdoors – adventure begins outside