Fetlock boots

You use fetlock boots to protect the horse's hind legs against over reaching. The hard shell of the fetlock boots protects the fetlock on the inside.
If you use a hind boot, the fetlock will be protected on both sides. Because this protector fits all the way around the leg, it will not shift if your horse is over reaching a lot. 

Do you also use tendon boots? Then you can mix and match a set with BR fetlock boots or you can opt for a complete set.