In reply to Denni:
Have used wild country one on little bit since she was three and used her chalk bag on a belt to keep it on in the same way the tom kitten has a strap. Wild country has more padding. Little bit is about to get her first sit harness as she is finally 3 12 years later just big enough to fit the smallest one we can find!
I'd get the one you like best
as you have probably looked at them all