The Gorewear M Women Base Layer Thermo Long Sleeve Shirt is a lightweight feeling winter base layer that delivers more warmth than expected. The Gorewear M Women Base Layer Thermo Long Sleeve Shirt is made from 92% polypropylene and 8% elastane, which the brand says offers a second skin feel. 2025 Gorewear M Women Base Layer Thermo Long Sleeve Shirt - collar.jpg (credit: road.cc)I tested a size S (recommended for UK 8-10) and it fit perfectly. 2025 Gorewear M Women Base Layer Thermo Long Sleeve Shirt - cuff.jpg (credit: road.cc)For a base layer that feels relatively thin, it performed very well, providing excellent warmth at 5-6°C when paired with only a long sleeve winter jacket. OverallThe Gorewear M Women Base Layer Thermo Long Sleeve Shirt is a soft, stretchy and well-fitting baselayer that performs impressively.