Detailed Collars or Plain?

Thank you Jessi and Victor Leigh, now it's very clear If you'll see that I'm making other language mistakes, please feel free to correct me My Homer is wearing a harness then. It's a regular harness, dark blue with a print of dog's paws traces. It's cute and it wasn't expensive.
Victor Leigh, I've never seen something like this There is one thing we can be sure of: when a dog wears it, he might be kidnapped soon

 

Before, we usually use plain collars and then tried a harness to one of our male dog.
Right now, our dog does not wear a collar since he could just freely run around the compound with gates always close of course.