Naturelle Latex Travel Pillow Over Slip

Hi, I wanted to let you know I am a little disappointed in not being able to try out my pillow right away. It wasn't advertised for my order that my memory foam pillow wasn't suitable for everyday pillow covers as I tried today and they don't fit. I would have been more than happy to purchase one initially but now shipping costs are too much for one item. Is there a way to lower the shipping cost if I order a pillow case or pillow over slip? Let me know. Thank you, Kindly, Nicole