Selling a Serta SleepTrue Sparkling Sky 2-stage crib mattress. It features a dual-sided design to grow with your child—firm fiber core for newborns on one side and a toddler-friendly side on the other. • Condition: Used but very clean. No stains, tears, or odors. • Safety: GREENGUARD Gold Certified for low chemical emissions. • Features: Waterproof vinyl cover that is easy to wipe down and hypoallergenic. • Fit: Fits all standard full-size cribs and toddler beds (52L x 27.5W x 5H). From a smoke-free and pet-free home.