Evoke uses bonnell springs with minimal bounce to increase support, and layers of soft foam to cushion your body. This is complemented by an active 3-zoned NRG layer that aligns the spine and improves blood circulation. Anti-stress fabric adds a finishing touch, with sleep-enhancing carbon particles that reduce the effect of negative ions. Thoughtfully engineered, this relaxing bonnell spring mattress makes every day feel like a fresh start.