The only ones that I will allow my girls to wear are the silk step in harnesses that chattiesmom (here at YT) makes. They are so light and comfortable that the girls don't even realize they are wearing them and they never get tangled up in their long coats. I buy her leashes and couplers as well. I also love that you can custom order which material you would like. ChattiesMom has the best customer service too
