The iComfort by Serta has a base and cooling upgrade with different layers:
note: the base model only looks to have 1 layer.
Inspired by the minimalist approach to sleep in the Far East, the Plank is the firmest, flattest, healthiest way to sleep. It has 4 layers of construction:
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Thank you for checking out this Serta iComfort vs Brooklyn Bedding Plank mattress comparison. We have tried to compare all the necessary information to help you choose which mattress is the most suitable for you.