Yes, our AS4 mattress is supportive from its top layer of Bio-Pur foam to its middle and base foams:
The comfort layer of Bio-Pur responds to your every movement to limit sinkage, keeping your spine from bowing so far into the mattress that you misalign your back.
The middle layer is Affinity foam with HIVE technology, which features five support zones so that it’s soft where you want it and firm where you need it. The head, back, and feet areas have a less flexible feel to create more support.
The base layer is Bio-Core foam, a material that’s so durable and sag-resistant that it’s the main reason why we can offer a 20-year warranty.