I use both pro and tendon and love them.
Have used Woof Wear since I was a little nipper on ponies and they have really advanced the technology and design in recent years. The Smart tendon is really breathable and tough whilst being really smart and easy to keep clean too! The poron foam in them is supposed to be waaay better than that D30 stuff in the really expensive Kentucky ones. I love my pro tendon and fetlocks too!
Woof Wear - great price - great product!