Do these mats have an odor? If so, how strong?

Our Tough Mats will have a slight rubber smell to them. To help mitigate this smell, we recommend mopping the floor with a mild soap and water solution with a synthetic mop head mop. You will then want to make sure the room where these mats will be used is well ventilated and let the mats air dry. You may need to repeat this process to get the smell of the mats to an acceptable level.