Comfortable!
I injured a muscle by my elbow.  I was constantly hitting it - a corner of the wall, a chair, the side of a door etc.  So I decided to buy some protection for my arm/elbow.  I bought two.  A black stretchy one and this.  The black stretchy was too tight and got very hot.  This one with open mesh and not so tight was much more comfortable to wear all day.  It still provided the protection so it worked for me.
Rating: 5 stars