​The Beautyrest Black® Hybrid Series Four Firm Apex Top mattress is designed to deliver premium support, pressure relief, and temperature management. It features Triple-Stranded Pocketed Coil® Technology and 4K Micro Coils for individualized support and motion separation. The Apex Top design incorporates three inches of FORM™ HD Material, which contours to the body to alleviate pressure points. Additionally, the mattress includes a cool-to-the-touch Sleep Climate™ Surface and Micro Diamond™ Memory Foam to promote a cooler sleep environment. This combination makes it ideal for back and stomach sleepers seeking a firm, supportive feel with advanced comfort features.