The iComfort by Serta has a base and cooling upgrade with different layers:
note: the base model only looks to have 1 layer.
The Bloom Earth by Sleep Country is a 3 layer mattress:
Experience cool and supportive sleep with the iComfort by Serta® mattress. Designed to keep sleepers cool, its multi-layered mattress-cooling foam technology provides support, resilience, and temperature regulation for a refreshing and comfortable sleep environment, regardless of whether you're a hot sleeper or not.
2.5" convoluted foam layer offers firm support for joints and pressure points.
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Thank you for checking out this Serta iComfort vs Bloom Earth mattress comparison. We have tried to compare all the necessary information to help you choose which mattress is the most suitable for you.