Serta's iComfort Quilted Hybrid Collection combines Cooling Specialty Foams with Premium Individually Wrapped Coils then topping with a Cooling Quilted Cover. Every iComfort mattress includes exclusive Carbon Fiber Memory Foam. This system channels heat away from your body and provides exceptional strength for back and neck support. Additional layers of Gel Memory Foam provide pressure relief and additional cooling. This Plush Mattress works well for a back or side sleeper.