Sweetnight CoolNest 14 Inch King Size Mattress - Cooling Memory Foam, 5-Zone Ergo Support, Pressure Relief, Medium Firm, CertiPUR-US Certified

Product Overview

The Sweetnight CoolNest is a 14-inch thick king size mattress constructed with multiple layers of specialized foam. The mattress measures 80 x 76 x 14 inches, making it compatible with standard king size bed frames. It features a dual-cooling system that combines PCMflux high-resilience foam with gel-infused memory foam to actively regulate temperature throughout the night. The 5-zone ergonomic support design incorporates support foam and comfort bars to target specific pressure areas, with particular attention to the back, hips, and shoulders. The mattress cover utilizes 3D-woven technology with ventilation pores that improve breathability by 35% compared to standard fabrics. All foams are CertiPUR-US certified, ensuring they are free from harmful chemicals, while the cover is OEKO-TEX certified for additional safety. The mattress arrives compressed in a box for convenient delivery and setup, requiring approximately 72 hours to fully expand to its intended dimensions and firmness. Reviewers note the mattress expands quickly upon unboxing, with many reporting minimal odor and rapid deployment. The medium firmness level provides a balance between soft comfort and supportive structure, making it suitable for combination sleepers and those who prefer neither too firm nor too soft surfaces. The memory foam construction effectively minimizes motion transfer, making it ideal for couples where one partner moves frequently during sleep.

Design & Build

The Sweetnight CoolNest features a 14-inch profile constructed with multiple specialized foam layers. The mattress begins with a base support layer that provides foundational stability and prevents sagging. Above this sits the 5-zone ergonomic support system, which incorporates targeted comfort bars and support foam in specific areas to address pressure points from head to toe. The cooling layers include gel-infused memory foam and PCMflux high-resilience foam with a hollow structure that promotes airflow. The cover utilizes 3D-woven technology with strategically placed ventilation pores that enhance breathability. All materials are certified for safety, with CertiPUR-US foams and an OEKO-TEX certified cover ensuring no harmful chemicals are present. The mattress weighs approximately 90.1 pounds, making it manageable for setup despite its king size dimensions.

The mattress arrives compressed in a box, with the foam layers vacuum-sealed and rolled for convenient delivery. Setup involves placing the mattress on a suitable foundation, removing the packaging, and allowing it to expand to its full 80 x 76 x 14 inch dimensions. Manufacturer instructions recommend allowing 72 hours for complete expansion and off-gassing, though many reviewers report the mattress expands quickly with minimal odor. The medium firmness provides a balanced feel that contours to the body without excessive sinkage. The cover is designed to be breathable and moisture-wicking, with the 3D-weave creating a cooler sleep surface. The mattress maintains a clean aesthetic that works with various bedroom styles, and its memory foam construction provides excellent motion isolation for undisturbed sleep.

Performance

The CoolNest's dual-cooling system performs effectively according to multiple reviewers, who report sleeping cooler throughout the night. The combination of gel-infused memory foam and PCMflux foam helps regulate temperature, reducing instances of overheating and night sweats. The 5-zone ergonomic support provides targeted pressure relief, with reviewers noting particular improvement in back, hip, and shoulder comfort. The medium firmness offers a balanced feel that accommodates various sleeping positions while maintaining proper spinal alignment. Motion isolation is excellent due to the memory foam construction, with partners reporting minimal disturbance when the other moves or gets up during the night. The mattress contours to the body without creating a 'sinking' sensation, providing both comfort and support.

The enhanced breathability system works as advertised, with the 3D-woven cover and hollow-structure foam promoting airflow to keep the sleep surface cool and dry. Reviewers who previously experienced heat retention with other memory foam mattresses report significant improvement with the CoolNest. The mattress maintains its shape and support over time, with no reported sagging or compression issues in initial reviews. The CertiPUR-US and OEKO-TEX certifications provide assurance of material safety and quality. Some reviewers note the mattress feels more supportive after a few nights of use as it fully expands and settles. The bed-in-a-box delivery system works efficiently, with most users reporting quick expansion and minimal off-gassing odors. The 10-year protection plan offers long-term confidence in the mattress's durability and performance.