Washable Crib Mattress with Dual Sleep Sides, 27.5" x 51.9" x 5.51" Standard Size for US Cribs and Toddler Beds

【Perfect Fit for US Standard Cribs】Snugly fits standard cribs and toddler beds (27.5" x 51.9" x 5.51"), leaving no gaps to ensure maximum safety. 【Dual-Sided for Growth Stages】Firm high-density foam side supports infants’ spines; flip to the softer cooling gel memory foam side for toddlers’ comfort. 【Certified Safe Materials】CertiPUR-US® certified foam, fiberglass-free construction, and a machine-washable cover for a healthy sleep environment. 【Cooling & Breathable Design】Breathable knitted fabric and an open-cell foam structure help regulate temperature and wick away heat for all-night comfort. 【Premium Multi-Layer Construction】Features 0.8" cooling gel memory foam, 1.6" plush cushioning foam, and 3.3" perforated foam for even support and durability.