furniture mattress store in thillainagar growell beds and furnitures trichy A Bonnell spring, latex foam, and memory foam mattress is a hybrid mattress that combines the support of Bonnell springs with the comfort and contouring properties of both latex foam and memory foam Bonnell springs are hourglass-shaped coils interconnected with spiral wires. They provide the primary support system for the mattress, offering stability and durability. Bonnell springs distribute body weight evenly across the mattress surface, promoting proper spinal alignment and reducing pressure points.