Melissa & Doug Round The City Rescue Rug With 4 Wooden Vehicles (39 x 36 inches)

What is the backing on this like? Can you use it outdoors or will getting it wet or dirty ruin it?

What are the measurements of the rug?

What are the washing and drying instructions for the rug?

I have looked at similar rugs and felt like they all had a strong odor to them probably from the backing. Has anyone noticed an odor with this rug?