Picking a pet identification tag for your Mudi is like purchasing an insurance policy – you do so with the faith that you won’t need it. The “possible cost” of not having a pet ID tag is more expensive than the “real price” of buying the pet tag itself.
The type of pet ID tag that you buy is important, so take 5 minutes or so to consider it. Whimsically choosing a collar tag just because it’s cheap or trendy usually ends up being unwise, in the long term.