Thanks heaps, I only take my dogs out at night. I’ve trained one as much as I can but she will always have this personality where she wants to assert some dominance, she came from a farm with 8 other dogs and I got her a little older, they just gave her to me and were happy to see her go actually. So I’m not sure what behaviour she may have picked up before I got her. So that being said it’s way safer to take both my dogs out to a dog park at night with few or no other dogs. She would be ok if it was the same dog each time but there is no consistency. So I bought these dog collars. My dogs always come back, going not far from me, and I’m never worried about losing them. But these collars help a lot especially for other humans that come near. They can see my dogs so easily, so it’s way safer. And yes they are somewhat waterproof. I’ve bought a few of these things and these ones have a fairly good rubber seal for when they go in the dog bath. It has never stopped working, but I do clean them often. The customer service was awesome, I was contacted regarding colour and size and it was very ez to sort out some stock issues. I think customer service is important, it’s respectful and it shows manners and thought. Thank you. I will be back.