❄️CoolTouch Tech: We know body temperature fluctuations are a leading cause of night wakings. BaybyNest's crib mattress features a unique hexagonal-knit Cooling fabric. This advanced weave enhances airflow and accelerates moisture-wicking, working to prevent the overheating and dampness that commonly occur for longer, more restorative sleep. We believe that when your baby sleeps peacefully, it’s one of the most precious gifts for the entire family. ✅2-Stage Design Grows with Baby: One mattress, from newborn to toddler years. Our dual-sided design thoughtfully supports your baby at every stage. Start with the firmer surface ideal for infant spinal development, then flip to the softer side for cozy comfort as your toddler becomes more active. It’s the perfect fit from infancy to toddlerhood. ✅3-Layer Sleep Solution: Cool, Supported, and Perfectly Aligned. We designed this mattress from the inside out to solve the big little problems that disrupt your baby's sleep. The top 0.5-inch cooling gel layer draws heat away to prevent overheating. The middle 1.5-inch memory foam gently cradles your baby's body to keep their spine straight and comfortable. It’s all supported by a firm, 4-inch core that prevents sagging for safe, stable sleep night after night. ✅Easy Care​ & True Comfort: The cooling sensation of our premium crib mattress is a permanent quality of the fibers, ensuring a breathable, hypoallergenic sleep surface. This reliable cooling effect won't wash out, even after repeated cleaning. 🥇Meets U.S. Safety Standards: Sleep soundly knowing this mattress is as safe as it is comfortable. It’s made with OEKO-TEX and CertiPUR-US certified materials and meets high breathability standards (≥1200 ml/㎡/s). Fits all standard 52" x 28" cribs. Just unroll and allow 48–72 hours for the mattress to fully expand to its 6-inch thickness. BaybyNest Crib Mattress (52"x27.5") - Primary Sleep Zone Nursery / Day & Night Sleeping / Infant to Toddler Dimensions: 52" L x 27.5" W x up to 6" H- Fits most standard full-size cribs and toddler beds. Weight: 13.23 lb Cover: About 50% Cooling Fiber,50% Polyester Breathability or Cooling: Cooling, Temperature Balance Fabric Materials & Certifications: Top layer of breathable gel memory foam Certifications: OEKO-TEX 100 Standard, CertiPUR-US Warranty:​ Worry-free 10-Year Limited WarrantyGeneral Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state. The expansion time of the mattress will vary as per the surrounding. Care & Maintenance The machine-washable cover just unzip the outer cover, machine wash in cold water on a delicate cycle (no bleach), and hang to dry — do not place in the dryer. Line dry to keep your child’s sleep environment fresh, clean, and cozy.