As with other simple projects I've included a little extra technique that can help make your sewing neater and longer lasting. In this case I'm referring to the bias binding. You don't need to do this but it may be a good chance to give it a go on a simple project.
You will need
Fabric -2 rectangles of fabric approximately 30cm by 45cm
Cord or ribbon for the draw string.
Bias Binding has a crease along the middle of the ribbon. This makes it much easier to wrap the bias around one of the raw edges of the seam. carefully sew along the the bias making sure it's secure along the raw edge of the fabric. This will protect the seam from wear .