This UK size 18 thermal long pants in white from Marks and Spencer are perfect for keeping warm during winter sports or outdoor activities. Made from a cotton blend material, these thermal pants feature a regular fit and are machine washable for easy care. With a scoop neckline and short sleeves, these pants provide a comfortable and casual option for layering under clothing. The white colour adds versatility to the garment, while the thermal feature ensures added warmth in cold weather.