The iComfort by Serta has a base and cooling upgrade with different layers:
note: the base model only looks to have 1 layer.
The Casper Original is good for sleepers of all kinds who want both support and cooling. Three layers of construction:
The Casper Blog
When we’re not making mattresses, we’re learning everything we can about the power of rest.…
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Thank you for checking out this Serta iComfort vs Casper Original mattress comparison. We have tried to compare all the necessary information to help you choose which mattress is the most suitable for you.