4FWarm women's thermal fleece underwear - a lightweight insulating layer for winter activities

4F women's fleece underwear is designed as a lightweight, functional second layer that effectively supports thermal comfort during winter activities – from skiing to trekking on colder days.

The 4FWarm technology helps retain heat close to the body without compromising breathability. This makes the underwear suitable for movement and changing weather conditions.

Thinner fleece is lightweight and comfortable to wear, making it an ideal choice under a jacket or softshell. It provides extra warmth without being bulky.

The stand-up collar with a zipper protects the neck from the cold and allows you to regulate the airflow, while the slim cut adapts to the figure, not restricting movement during activity.

PRODUCT FEATURES

• 4FWarm technology supporting thermal comfort
• light, thin fleece material
• purpose: second layer of clothing
• stand-up collar with zipper
• slim fit to the figure
• breathable construction suitable for under a jacket