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

The 4FWarm technology used in this product supports thermal comfort by helping to reduce 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 during skiing and 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 a warm inner side, flexible fabric and functional construction makes this men’s thermal underwear top a comfortable choice for active recreation on the slopes.

KEY FEATURES

• Brand: 4F
• Type: men’s insulated thermal underwear top
• Purpose: second clothing layer for cold conditions
• 4FWarm technology: supports heat retention and thermal comfort
• Insulation: soft, brushed inner side that helps reduce 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
• Fabric: flexible synthetic knitted fabric
• Main fabric: 90% polyester, 10% elastane
• Use: skiing and winter activities