The Dreams King Silentnight Risborough Mirapocket mattress is a solid white rectangle with a medium firmness level, measuring 200cm in length and 150cm in width. It is a top mattress with a thickness of 24.5cm, suitable for a bedroom setting. Manufactured by Silentnight in the United Kingdom, this memory foam mattress is designed for optimal comfort and support, weighing 27000g. It is recommended to follow care instructions and avoid using bleach to maintain its quality.