Split Head King Size Serta iSeries NXG 4500 Plush Hybrid Mattress w/Adjustable Base

Serta iSeries NXG 4500 Plush Hybrid Split-Head King Mattress with Flex Adjustable Base — Dual Comfort, Cooling Relief & Personalized Recovery

Sleep your way — together — on the Serta iSeries NXG 4500 Plush Hybrid Split-Head King Mattress with Flex Adjustable Base, available today at Gallery Furniture with Free, Free, Free Same-Day Delivery throughout the Houston area. Designed for couples who want independent head adjustment without the divide of a full split bed, this premium split-head king delivers plush comfort, cooling technology, and next-level adjustability for the ultimate shared sleep experience.

Key Features

Split-Head King Design
Each sleeper enjoys independent control at the head for personalized elevation while the connected lower section keeps the mattress unified for a seamless feel. Perfect for couples who prefer different head positions for reading, relaxing, or recovery without losing that togetherness of a single bed.

5-Zone Coil Support System
Engineered with Serta’s advanced 5-Zone Support Coil System, this mattress provides precise, targeted support for your head, shoulders, back, hips, and legs. The BestEdge® Foam Encasement enhances edge-to-edge stability so you can stretch out and enjoy every inch of your King-size comfort.

Plush Pressure Relief
Premium high-density memory foam layers contour deeply to your body for pressure-relieving comfort. Ideal for side sleepers, the plush design cushions your shoulders and hips while maintaining proper spinal alignment.

CoolFeel™ Cover + Carbon Fiber Memory Foam
A cool-to-the-touch CoolFeel™ Cover paired with Carbon Fiber Memory Foam draws heat away from your body, keeping you cool even through Houston’s warmest nights. Wake up refreshed, not overheated.

Motion Control System
Enjoy undisturbed rest with advanced foam and coil layers that isolate motion — so your partner’s movements stay on their side of the bed.

Flex Adjustable Base — Smart Comfort at Your Fingertips
The included Flex Adjustable Base transforms your sleep experience into a personalized relaxation zone:

• Power Head Lift & Foot Lift — find your perfect position for reading, lounging, or zero gravity

• Power Lumbar Support — relieve tension in the lower back

• Zoned Massage — enhance circulation and ease muscle stress

• Built-in Sound Speakers — enjoy white noise, nature sounds, or music for total relaxation

Together, this split-head king mattress and Flex base create a luxury sleep system built for rest, recovery, and real-life comfort.

Why Buy from Gallery Furniture

• Buy Today, Sleep Tonight — Free, Free, Free Same-Day Delivery across Houston and surrounding areas

• Free Set-Up and Haul-Off of your old mattress and base (haul-off applies to replacement items only)

• Professional In-House Delivery Team — never third-party crews

• Trusted Houston Service before, during, and after the sale

Customer Reviews

⭐️⭐️⭐️⭐️⭐️ “The split-head design lets my husband stay flat while I elevate to read — and we both love the cooling comfort. Gallery Furniture made it so easy to get same-day delivery.” – Denise & Mark H., Katy, TX

⭐️⭐️⭐️⭐️⭐️ “The Flex base features are amazing — massage, sound, and lumbar support in one. It’s our favorite bed ever.” – Lauren P., Houston, TX

FAQs

Q: What’s unique about a split-head king mattress?
A: It offers dual-zone head adjustability for each sleeper while maintaining a connected lower section, perfect for couples who want flexibility without a full split design.

Q: What does the Flex Adjustable Base include?
A: Power head lift, foot lift, power lumbar, zoned massage, and built-in sound system — all controllable via wireless remote.

Q: Who is this mattress ideal for?
A: Side sleepers, couples seeking personalized adjustability, and anyone who wants cooling comfort with plush support.

Q: Does this mattress get warm?
A: No — the CoolFeel™ Cover and Carbon Fiber Memory Foam actively pull heat away for a cool, refreshing sleep.

Q: Is it made in America?
A: Yes! The Serta iSeries NXG 4500 Plush Hybrid is proudly designed and assembled in the USA.