I definitely notice a difference when using this, my mare has chronic neck and poll issues and seems way more comfortable after using this! The sizing is tricky though, she is only 15 hands and very dainty so I thought the medium would work but it's almost too small to close around her barrel. Also the zipper came all the way undone while she was eating, so I have to kind of fold over the velcro fastening to keep it from doing that. Otherwise I love it and will continue to use it!
Medium