Lightweight and quick drying base layers for all-day warmth and comfort. Retains body heat to help conserve energy throughout the working day. Slim-fitting design is ideal for layering in cold conditions and the stretch fabric offers flexibility for ease of movement. 92% polyester, 8% elastane. Lightweight and quick drying base layers for all-day warmth and comfort. Retains body heat to help conserve energy throughout the working day. Slim-fitting design is ideal for layering in cold conditions and the stretch fabric offers flexibility for ease of movement. 92% polyester, 8% elastane.