glacier° Summit Hybrid Mattress features a 6-layer design with a glacierTech° Elite cooling ChiroZONE™ quilted cover with a Euro top gusset for added comfort and breathability. As our most popular hybrid mattress, it offers 2x the cooling fibers and memory foam of the glacier° Original Hybrid while maintaining the same advanced coil technology for optimal support. Provides pressure relief with a lifted feel, along with balance of support and contouring. Ideal for all sleeper types. Experience Glacier’s next-level hybrid mattress, built with enhanced cooling fibers, deeper pressure relief, and breathable support from top to bottom. The Summit Hybrid combines plush memory foam, advanced ventilation layers, and responsive coil technology to help heat escape, promote airflow, and deliver a cooler, more weightless night’s sleep. • Summit Hybrid- Hybrid Design: premium memory foam comfort layers paired with responsive pocketed coils for the ideal balance of cushioning comfort, durable support, and motion isolation. • Enhanced Cooling Cover- Designed with enhanced cooling fibers to help create a cooler, more comfortable sleep surface from the moment you lie down. • ARCFlow™ Ventilation Foam- Breathable, ventilated foam helps promote airflow throughout the mattress while delivering pressure relief and responsive comfort. • CarbonICE™ Lumbar Zone Support- Graphite-infused memory foam provides targeted support through the lumbar zone while helping draw heat away from the body for cooler, more comfortable rest. Includes mattress only. Mattress plus box spring option also available. Mattress arrives compressed in a box and then regains its size and shape after opening.