The Erin Hills Extra Firm Collection provides a supportive, comfortable and cool sleeping mattress. Supported with Individually Wrapped Coils that adjust to your body's shape keeping your spine strait and supported. Cushioned with Gel Active® Gel Memory Foam relieving pressure points allowing your blood to flow so you wake up refreshed and rested. Topped with a CoolRight™ cover, keeping you cool and fresh. This mattress is a good mattress for a stomach sleeper or a back sleeper who likes a harder feel to their bed.