Shoo! Tags for flies

[R.A.H]

Have any of you used these before? Do they actually work? Where did you get yours from?
My horse is having a real hard time with flies at the moment & fly repellent doesn't seem to be doing anything.

 

[R.A.H]

Can only find one place in the UK that sell them. You can get them for cats & dogs aswell. Here's the link to the Shoo! Tag website
http://www.shootag.com/farm/for-horses/