31⁄2 by 6 8” Plain Mattress – Thick, Durable Medium Firm Support

This 31⁄2×6×8 plain mattress is built with high-density foam to provide medium-firm support and long-lasting durability. The extra 8-inch thickness offers superior cushioning and comfort, making it ideal for semi-double beds, guest rooms, or everyday home use. Its breathable fabric cover is easy to maintain, ensuring a fresh and supportive sleeping experience.