This will be my dogs second Deaf Dog collar. The first one lasted 18mths before I had to renew it as the steel D ring rusted and was leaving rust stains on his white coat. He often goes in the sea but even rinsing and drying the collar after each use did not stop it rusting. Also I have found only about 10% of people we come into contact with, read what's on the collar and one woman thought it meant I was deaf !!
Words are big enough that it is easy to read and it stands out nicely. It does get dirty very easily, have not tried to wash it yet.
All of our items are machine washable. Just pop in a pillow case of delicates bag to stop the clips banging around.Feedback says that napisan works a treat too :)