The 4F men's seamless long-sleeved thermal underwear is designed as a base layer for winter activities. Its form-fitting construction is ideal for skiing and snowboarding, where freedom of movement and efficient moisture management are essential.

4FSkin technology supports a close-fitting material fit, creating a second-skin effect. 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 away moisture during activity, while a specially designed ventilation zone helps maintain proper air circulation. This makes the long sleeve shirt a good base layer under ski or snowboard clothing.

Raglan sleeves allow for freedom of arm movement, and a crew neck provides a classic finish. The fitted shape allows the T-shirt to be worn comfortably under layers of clothing without creating excess bulk.

KEY FEATURES

• men's seamless thermal underwear 4F
• long sleeve long sleeve
• 4FSkin technology
• second-skin fit
• seamless construction
• quick-drying finish
• ventilation zone supporting air circulation
• raglan sleeves for increased freedom of movement
• round neckline
• intended as the first layer of clothing
• intended use: skiing, snowboarding and winter activities