Octaspring mattress The Octaspring mattress not only compares very favourably to the Tempur mattress but is regarded as the best in class for comfort. If you like the feel of a traditional quality memory foam mattress but don’t want the heat and humidity. The open honeycomb designed Octasprings sit on top of a sturdy base of breathable Eco-cell®. 3D air-mesh sides allow the memory foam to breathe. This gives a mattress that is cool, is exceedingly comfortable and supportive in all the right places.