The 4F Junior boys' thermal underwear set is designed as a base layer for skiing and other winter activities. The set includes a long-sleeved T-shirt and leggings, creating a functional base for subsequent layers.

4FSkin technology supports a close-fitting material that feels like a second skin. The flexible construction fits well under ski clothing, allowing for unrestricted movement during activity.

The seamless construction reduces the number of exposed seams, reducing the risk of chafing and irritation during prolonged use. A quick-drying finish helps wick moisture away from the material's surface, helping maintain comfort during exercise.

A crew-neck T-shirt with raglan sleeves allows for freedom of movement for the upper body, while matching leggings complete the set, designed to be used as a base layer. This set is perfect for skiing and other winter activities.

KEY FEATURES

• boys' thermal underwear set 4F Junior
• set: long-sleeved T-shirt + leggings
• 4FSkin technology
• second-skin fit
• seamless construction
• quick-drying finish
• intended as the first layer of clothing
• round neckline
• raglan sleeves for increased freedom of movement
• intended use: skiing and winter activities
• sizes: 128/134, 140/146, 152/158, 164