Finally, the perfect protector for your mattress!. Made with professionally quilted organics fabric and natural wool it fits like a pillow case over your natural wool mattress and best of all, it will handle being machine washed. The other option is to use it to cover the mattress stiffener so you create a firm mattress which may be cooler for summer without needing the standard wool mattress at all. In all cases you will still need to put a fitted sheet on it when making babies bed.