Onlylucky Firm King Mattress 12 Inch, Luxury Hotel Level King Size Mattress in a Box with Gel Memory Foam & Individual Pocket Springs, Upgraded Strong Edge Support, Fiberglass-Free

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【Pain Relief & Spine Alignment】Onlylucky king size mattress features multi-layer memory foam and reinforced individual pocket springs for comfort and targeted support. The ergonomic 7-zone support system evenly distributes body weight, relieves pressure points and improves spinal alignment, offering softer cushioning at shoulders/hips while enhancing lumbar support to fully fit your body curves. Suitable for all sleeping positions, it helps reduce back pain for luxurious sleep. 【Stay Cool & Comfort Sleep】Featuring a Euro Top design for enhanced comfort, Onlylucky king bed mattress combines breathability with advanced cooling technology for optimal temperature regulation. It uses skin-friendly and breathable fabric that is fiberglass-free, effectively boosts breathability by 30%. The gel memory foam helps you stay cool and dry all night. The individual pocket spring system and egg crate foam layer improve air circulation delivers a comfortable sleeping experience. 【Upgraded Enhanced Edge Support】Onlylucky king mattress 12 inch is reinforced with 2.1–2.3mm perimeter coils and high-density support foam on the sides to prevent sagging. It effectively prevents body roll and expands sleep space, reduces the risk of edge roll during nighttime movement and improves convenience when sitting, lying down, and getting in or out of bed. The upgraded edge design also protects the internal structure and extends the lifespan of the mattress. 【Motion Isolation & Quiet Sleep】Onlylucky king memory foam mattress features hundreds of premium quiet individual pocket springs and slow rebound memory foam, effectively absorbing noise and vibration caused by turning over during sleep, minimizing motion transfer to your partner and allowing you to enjoy deep sleep without being disturbed, making it ideal for light sleepers. 【CertiPUR-US Safety & 365-Night Trial】Onlylucky king mattress in a box comes vacuum-sealed for easy transportation. Designed to fit most standard bed frames, it features convenient side handles for easy mobility and position adjustment. Onlylucky king hybrid mattress is CertiPUR-US certified, and we offer a 365-night trial and 24-hour customer assistance. For optimal comfort, please allow 24 to 72 hours for the mattress to fully expand.