Enjoy a wondrous night's rest on Beautyrest's Harmony Lux Hybrid Seabrook Island 13"" Firm Mattress. Improved support and advanced motion isolation are brought together through innovative materials that work harmoniously to bring you restorative sleep. The pocketed-coils of the Precision Support System offer head-to-toe support across the entire mattress, so you and your partner sleep undisturbed. Infinicool Lux technology helps you stay comfortably cool all night with its breathable, moisture-wicking fabric infused with cooling fibers and cooling technology. Pressure-relieving Beautyrest ActiveResponse Memory Foam helps ease aches and pains while also creating airflow throughout the mattress.