This deluxe spring Open Coil Mattress is British-made, with a traditional Bonnell spring unit, encased in superior dent-resistant nursery foam. It offers the best support and comfort to ensure a natural sleep posture, as well as ventilation and hygiene benefits. The mattress core is encased in a stocking net with an adjustable waterproof membrane on top, for any required position i.e. the feet to foot. The mattress has a removable cover that incorporates a side zip to allow easy removal for washing. The cover is made of baby-tech fabric, which is specially developed with a water-resistant and wipe-clean surface, fully breathable and washable at 60 degrees. No PVC is used for this baby and nursery mattress. The mattress complies with BS1877 part 10 for safety and performance and is BS7177 (low hazard).