The Ventalux Quilted Sprung Interior Cot Mattress is a luxurious 12.5cm (5 inches) thickness and is composed of a core of mini-bonnell spring units encased in an environmentally friendly super-fibre material, helping maintain the shape and prolonging the lifespan of the mattress. The hygienic and anti-allergenic pinsonic quilted cover is breathable and moisture resistant. The cover is zipped around three sides to make it easier to remove and replace for washing. It is fully breathable and air permeable. It is designed for placing your baby in the ‘feet to foot’ position.