BabyStyle Deluxe Dream Sprung Mattress This BabyStyle Dream Sprung Mattress is recommended for use with the BabyStyle Cot Beds. How to measure To measure the size of the mattress you need, measure the internal length and internal width of the furniture in cm. Features Traditional Springs interior Mattress fully breathable with anti micro-bacterial filter system and  zip off washable covers Mattress Covering is Deluxe Quilted Polyester - A quilted polyester fabric which is fully breathable, machine washable up to 60 degrees (cool tumble only) and is quilted for extra comfort. 10cm thick (Depth) This BabyStyle Dream Sprung Mattress is recommended for use with the BabyStyle Cot Beds.