Your color choices are limited only to what is available in materials at the time you order. The material is water repellant. I use two different patterns, usually a print of some kind on one side and then a solid coordinating color on the other side.
You can even leave the Outdoor material on the cart year round if you desire.
It is made of 100% polyester front and back with polyester fiber fill. You can Vacuum, Spot Clean With Water Based Agent, or have a Professional Cleaning, which is what the manufacturer recommends.