Serta iSeries NXG 3500 All-Foam Medium Mattress

Balanced comfort. Adaptive support. Advanced cooling.

The Serta iSeries NXG 3500 All-Foam Medium mattress is thoughtfully designed for sleepers who change positions throughout the night and for couples with different comfort needs. Its medium feel delivers the ideal balance of cushioning and support, allowing the mattress to gently contour to your body while preventing excessive sink. This adaptive comfort helps relieve pressure at the shoulders and hips when side sleeping, while still providing the stability needed for back and stomach sleeping positions.

Advanced memory foam layers respond quickly to movement, making it easier to shift positions without feeling “stuck,” while the all-foam construction minimizes motion transfer to reduce sleep disruptions from a partner’s movements. Cooling technologies work together to regulate temperature and maintain consistent comfort across the sleep surface, helping both sleepers rest comfortably throughout the night. The result is a versatile, balanced sleep experience that supports deeper, more uninterrupted rest for a wide range of sleep styles.

Best for combination sleepers who change positions during the night and couples seeking balanced comfort, pressure relief, and motion isolation.

 

Comfort Level: Medium

Made in the USA with Global Components

Mattress Type: All-Foam Mattress

Sleep Style: All Sleep Positions

Adjustable Base Compatible: Yes

Benefits: Balanced comfort, cooling performance, motion isolation

 

Sustainability:

• CertiPUR-US® Certified Foams – Low-VOC materials support healthier indoor air quality.
• Durable Foam Construction – Designed for consistent performance and reduced replacement frequency.

 

Quilt: CoolFeel™ Cover for immediate cooling comfort

 

Comfort Layers:

• Carbon Fiber Memory Foam with CoolFeel™ Plus System channels heat away
• Deep Reaction® Max Memory Foam adapts quickly for responsive pressure relief
• NXG™ Memory Foam provides premium contouring support
• EverCool® Fuze Gel Memory Foam enhances airflow and temperature regulation

 

Support System: High-density foam core with Ultimate Edge™ Support for long-term stability

 

Warranty: 10-Year Limited Warranty

 

Dimensions:

• Twin XL Size: 39" W × 79.5" L × 13.5" H
• Full Size: 54" W × 74.5" L × 13.5" H
• Queen Size: 60" W × 79.5" L × 13.5" H
• Split Head Queen Size: 60" W × 79.5" L × 13.5" H
• King Size: 76" W × 79.5" L × 13.5" H
• Split Head King Size: 76" W × 79.5" L × 13.5" H
• California King Size: 72" W × 83.5" L × 13.5" H

Recommended Foundation:

• Rio 2.0 Adjustable Bed Base | City Mattress
• Serta Naples Foundation – City Mattress