Unlike all-foam mattresses, the Aviya hybrid mattress provides core support using an innerspring system where each individual steel coil is wrapped in its own fabric pocket. Springs provide “active support” versus the passive support of foam, literally pushing back to support your body. The result is a more responsive sleep surface with greater comfort no matter what position your body may move to throughout the night. With 800 coils (in queen size) and a full 8” spring depth, our innerspring system provides deeper and more substantial support than the lower quality linked spring systems or 2-3” tall “micro” coils found in other innerspring mattresses.