Split Head King Size Serta iSeries NXG 3500 Firm Hybrid Mattress w/Adjustable Base

Serta iSeries NXG 3500 Firm Hybrid Split-Head King Mattress with Flex Adjustable Base — Firm Support, Dual Comfort & Total Sleep Control

Discover the perfect blend of luxury, performance, and precision adjustability with the Serta iSeries NXG 3500 Firm Hybrid Split-Head King Mattress and Flex Adjustable Base, available today at Gallery Furniture with Free, Free, Free Same-Day Delivery across the greater Houston area.

Ideal for couples who want personalized comfort without the separation of a full split bed, this split-head King mattress offers independent head adjustability on each side with a connected lower section — giving you the freedom to relax your way while staying close together.

Key Features

Split-Head King Design for Couples
Enjoy dual independent head controls for customized elevation on each side of the bed, while the connected foot section provides seamless motion and unified comfort. Perfect for couples who want different head positions for reading, watching TV, or resting — without compromising closeness or space.

Firm Feel for Superior Support
The Serta iSeries NXG 3500 Firm Hybrid is built for long-lasting stability and targeted support. Its firm feel promotes proper spinal alignment, making it an excellent choice for back and stomach sleepers who need consistent, balanced comfort.

5-Zone Coil Support System
Serta’s 5-Zone Support Coil System delivers adaptive reinforcement across key pressure zones — head, shoulders, lumbar, hips, and legs. The BestEdge® Foam Encasement extends support to every edge, maintaining stability and maximizing usable sleep surface across the spacious King size.

Premium Memory Foam Pressure Relief
High-density memory foam layers cradle your body while maintaining firmness, easing stress on joints and muscles for restorative rest night after night.

CoolFeel™ Cover + Carbon Fiber Memory Foam
Stay cool and refreshed with a CoolFeel™ Cover that’s soft and cool to the touch. Beneath it, Carbon Fiber Memory Foam channels heat away from your body, helping regulate temperature through even the warmest Houston nights.

Motion Control Technology
Engineered to minimize partner movement, this hybrid mattress ensures you both enjoy uninterrupted rest — even with separate head adjustments.

Flex Adjustable Base — Smart Comfort and Recovery Features
The included Flex Adjustable Base elevates your comfort and wellness with:

• Independent Head Lift & Shared Foot Lift for ergonomic customization

• Power Lumbar Support to relieve tension in your lower back

• Zoned Massage Function for relaxation and circulation improvement

• Built-in Sound Speakers for white noise or soothing sound therapy

• Wireless remote and programmable presets for effortless use

Together, this split-head King sleep system delivers exceptional comfort, firm support, and innovative technology designed for total-body recovery.

Why Shop Gallery Furniture

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

• 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 outsourced or third-party crews

• Houston’s Trusted Sleep Experts delivering world-class service before, during, and after your purchase

Customer Reviews

⭐️⭐️⭐️⭐️⭐️ “We love the split-head King! My wife likes to elevate while I stay flat — it’s perfect for both of us. The firm feel gives my back great support and the massage feature is unbelievable.” – Jason & Michelle T., The Woodlands, TX

⭐️⭐️⭐️⭐️⭐️ “This setup is amazing. The lumbar support and sound features are a game-changer, and Gallery Furniture delivered and set it up the same day!” – Robert M., Houston, TX

FAQs

Q: What makes a split-head King mattress different?
A: It allows each sleeper to adjust their own head position independently while keeping the lower section unified — ideal for couples who have different comfort needs but prefer to share one mattress.

Q: What features does the Flex Adjustable Base include?
A: Power head and foot lift, power lumbar, zoned massage, and built-in sound — all controlled with a wireless remote for easy comfort customization.

Q: Is the NXG 3500 Firm good for side sleepers?
A: It’s best suited for back and stomach sleepers who prefer firm, stable support with light contouring pressure relief.

Q: Does it stay cool through the night?
A: Yes — the CoolFeel™ Cover and Carbon Fiber Memory Foam help regulate temperature for cool, comfortable sleep.

Q: Is this mattress made in America?
A: Absolutely. The Serta iSeries NXG 3500 Firm Hybrid is proudly designed and assembled in the USA for lasting quality and performance.