The 4F men’s insulated thermal base layer is a thermal clothing top designed to be worn as a second layer while skiing and during other activities in cold conditions. The brushed inner side of the fabric helps retain warmth, while the comfortable regular fit ensures freedom of movement. This model by 4F is suitable as an additional warming layer under a ski jacket.

The applied 4FWarm technology supports thermal comfort by helping to limit the loss of body-generated heat. The soft, brushed inner finish provides additional insulation during activities in low temperatures. The main fabric consists of 90% polyester and 10% elastane. The addition of elastane increases the flexibility of the knitted fabric, allowing the garment to adapt to body movements while skiing and during other winter activities.

The regular fit provides a comfortable fit without excessive pressure, allowing unrestricted movement. Flat seams help reduce friction between the fabric and the skin, lowering the risk of irritation during extended wear. The classic collar provides additional coverage around the neck. The combination of the insulated inner side, flexible fabric and functional construction means that the men’s thermal base layer top supports comfort during active recreation on the slopes.

KEY FEATURES

• Brand: 4F
• Type: men’s insulated thermal base layer top
• Purpose: second clothing layer for cold conditions
• 4FWarm technology: supports heat retention and thermal comfort
• Insulation: soft, brushed inner side helping to limit heat loss
• Fit: regular – comfortable fit and freedom of movement
• Seams: flat, reducing the risk of chafing and irritation
• Collar: classic, covering the neck area
• Material: flexible synthetic knitted fabric
• Main fabric: 90% polyester, 10% elastane
• Use: skiing and winter activities