Specially crafted with waterproof lock-stitched binding instead of cotton binding so wetness doesn"t seep inside to cause mold and bacterial growth. * The Sealy Precious Rest offers durable Sealy support with 104 heavy gauge interwoven steel coils for firmness * Full perimeter border wire keeps all the edges firm and secure 2 thick hypoallergenic comfort and support wraps are tested for lasting durability. * Reinforced waterproof cover and binding means the entire mattress wipes clean. Airflow pocket keeps mattress fresh without potentially hazardous small metal vents * Measures 51.625 x 27.25 x 5.25.