Sweetnight CoolNest 12 Inch King Mattress, Cooling King Size

Product Overview

The Sweetnight CoolNest 12 Inch King Mattress delivers a restorative sleep experience through its advanced CoolNest System, engineered specifically for those who struggle with nighttime overheating. Designed with dual cooling technology that combines PCMflux high-resilience foam and gel-infused memory foam, this mattress actively manages body heat transfer, keeping sleepers cool and comfortable throughout the night. The medium firmness level provides balanced support ideal for side, back, and stomach sleepers, while the 5-zone ergonomic support structure aligns the spine and reduces pressure on hips, shoulders, and other sensitive areas. CertiPUR-US® certified, the CoolNest King ensures peace of mind by eliminating harmful chemicals such as ozone depleters, mercury, lead, and flame retardants commonly found in lower-quality foams. Whether you’re upgrading from an older mattress or seeking relief from hot flashes, restless nights, or chronic discomfort, this king-size foam mattress offers a modern solution tailored to comfort-conscious sleepers.

Key Features

• CoolNest Dual Cooling Technology: Utilizes a unique blend of PCMflux high-resilience foam and gel-infused memory foam to create a breathable, temperature-regulating surface that prevents heat buildup—ideal for hot sleepers and warm climates.
• 5-Zone Ergonomic Support: Strategically designed zones provide targeted cushioning where it’s needed most—under the head, shoulders, hips, and legs—while maintaining spinal alignment and reducing motion transfer between partners.
• Medium Firmness Profile: Offers a responsive yet supportive feel that adapts to your body shape without excessive sinking, making it suitable for a wide range of sleep positions and body types.
• CertiPUR-US® Certified Foam: Tested for durability, emissions, and heavy metals; free from phthalates, PBDEs, TCEP, and other toxic substances that could compromise indoor air quality or skin health.
• Spacious King-Size Design: At 76 inches wide and 80 inches long, the CoolNest King provides ample space for couples or individuals who prefer extra room to move during sleep.

Technical Specifications

• Dimensions: 76″ W x 80″ L x 12″ H
• Firmness Level: Medium (on a scale typically ranging from soft to firm)
• Top Layer: Gel-infused memory foam for contouring comfort and heat dispersion
• Middle Layer: PCMflux high-resilience foam offering bounce-back support and airflow
• Base Layer: Dense supportive core with 5-zone ergonomic engineering
• Certification: CertiPUR-US® certified for safety, performance, and environmental standards
• Technology Platform: Built around the proprietary CoolNest System for active temperature regulation

Benefits & Use Cases

The Sweetnight CoolNest King is especially beneficial for adults who frequently wake up feeling overheated or experience poor sleep quality due to thermal discomfort. Its dual-layer cooling system works continuously to dissipate body heat, making it a top choice for people living in humid regions, those prone to night sweats, or anyone transitioning from traditional innerspring mattresses that retain warmth. The 5-zone support adapts dynamically to your body’s natural curves—offering softer pressure relief under lighter areas like the shoulders and knees while maintaining firmness along the spine for optimal posture. This makes it equally effective for side sleepers seeking shoulder and hip relief, back sleepers needing mid-body support, and even stomach sleepers who benefit from reduced lower back strain. Because the foam layers minimize motion transfer, restless sleepers or light sleepers sharing the bed will appreciate fewer disruptions when their partner moves. While not explicitly rated for extreme weight limits, the high-density base layer suggests reliable performance across average to above-average body weights. The king size format ensures both partners have sufficient personal space, reducing the likelihood of “bed separation” and enhancing overall sleep satisfaction. For homeowners investing in a new master bedroom setup, the CoolNest King represents a smart balance of innovation, comfort, and long-term value.

Important Notes

Upon delivery, allow the mattress 24–48 hours to fully expand and off-gas before use. The product arrives vacuum-sealed and compressed—do not attempt to re-roll or compress it once unpacked, as this may damage internal foam structures. Place only on a clean, flat foundation compatible with foam construction, such as a solid platform bed, low-profile frame, or firm platform. Avoid placing directly on adjustable bases, water beds, or overly soft foundations unless confirmed compatible by the manufacturer. Spot cleaning is recommended using mild soap and water; never submerge or saturate the mattress with liquid. Warranty terms and return policies vary by retailer—contact your seller directly for details. Note that this listing does not include a mattress protector, foundation, or bedding—sold separately unless part of a promotional bundle. Due to its foam composition, performance may be less optimal in extremely cold environments; best used in climate-controlled indoor settings.