furniture & Foldable mattress outlet in thillainagar growell beds and furnitures trichy A foldable 2-layer orthopedic 4-inch HD (High Density) foam and gel memory foam mattress offers comfort, support, and convenience, especially for those with orthopedic concerns. The mattress is designed to be foldable, allowing for easy storage or transportation. This feature is convenient for those who need a temporary sleeping surface or have limited space.The mattress typically consists of two layers: a base layer of high-density foam (HD foam) for support and stability, and a top layer of gel memory foam for comfort and pressure relief.