Product details:The thermal tops in this pack will keep you snug on cooler days. Their long-sleeved design ensures good coverage. Plus, there's added stretch for comfy wear. Our Heatgen™ technology gives you extra insulation from the chill via a lightweight and supersoft fabric. Made with responsibly sourced viscose. M&S Collection: versatile styles in modern shapes with unique and playful details. M&S Women's 2pk Heatgen™ Thermal Long Sleeve Tops - 12 - Light Grey, Light Grey