We have washed them many times. No problem with our Bosch machine in the UK. But with our much cheaper one in France, they started to split at the end. They were replaced no problem, but when it happened again, we rather thought it was more the problem of our cheap washing machine, and din't complain. They are a nice firm to deal with. The mats are excellent and well worth having. We used to have one in the house and one in the caravan awning. Now we just have them in the house, on the tile floors, in front of the exterior doors.