Hello to the Bully Billows TRI-Harness ® family :0) 
If you are looking to invest in a harness, this is the one.  With 3 key points of contact for a lead, it is designed to avoid sensitive areas such as the under arms.  Two points of contact on the back and one on the front (chest area).  
Provides comfort and durability and helps to create an enjoyable walk.  The design helps to avoid rubbing in sensitive areas.  
We love that Bully Billows has trademarked and copyrighted their designs.  They take everything in consideration to help provide a better experience with your fur babies.
Trademark and Copyrighted Design Rights Number 6189802
If your dog is a puller (like one of our own), it can be impossible to walk.  It also does not help our own backs and shoulders.  By having the three points of contact, it helps to reduce a possibility of injury.
Strong puller?  Use this harness with the Double Ended training leads.  These leads can be attached to the multiple D-Loops on the harness.