Serta has joined forces with the National Sleep Foundation (NSF) to design the all-new Perfect Sleeper, the only official mattress of the National Sleep Foundation, engineered to help solve 5 common sleep problems: tossing & turning, lack of support, sleeping too hot or too cold, partner disturbance and mattress roll off or sag. Essential collection features the 520 Continuous Support® Innerspring support system (520 coils in queen size), Reinforced Edge® system, more expensive models feature Cool Twist™ Gel Memory Foam Cool Twist™ Gel Memory Foam. 10 year limited warranty.

Perfect Sleeper Essential models come in several softness options: Firm, Plush, Pillow Top these will vary in type and thickness of the comfort layers.

Some retailers have their "exclusive" collections with minor modification in type and thickness of padding layers. When comparing models always focus on coil type and coil amount, and also presence and thickness of premium materials - memory foam, gel foam, latex. Many retailers will have different names for the same mattress in this line, so you need to focus on an actual line not a single product. To learn more about different names of the same mattress click here.