LightInTheBox offers the Naturehike Camping Pillow in several colors (Blue pictured) for $5.99 with free shipping. That's the lowest price we could find by $4. It measures 17" x 13" x 5".

Note: This item ships from China and may take two to three weeks to arrive. Uncheck "Add Shipping Insurance to your order" during checkout to remove the 49-cent fee.