Why Comfort X Dual Snap? The Comfort X Dual Snap Harness has our signature and patented Choke-Free V-Neck X-Frame design. After all, it wouldn't be a comfort x harness without it. We're not against collars. We just think that collars aren't ideal for walking your dog. Why is that? Small dogs naturally just have smaller neck structure and because of that, they are more prone to neck injuries. Especially if yours is a strong puller.Unintentional yanking and leash pulling can often times cause damage to their precious neck. Besides its choke-free features, here are some other prominent features Easy-Snap Rotational Buckles Easy on your fingers - minimizes the effort and stress on your fingers when putting on the buckles. You will love it and find it helpful if you have finger joint pain or other related medical conditions such as arthritis. Adds comfort to your pup - rotates when your pup makes sudden turns and transforms the harness into one with a flexible body frame. Flexible Body Frame - contours to your pup's body shape and moves around as your pup moves, creating maximum comfort. Scratch Resistant Outer Layer & Inner Body Mesh prevents scratches from your pup's paws or other objects when you guys are out for your walks. the inner layer is made with breathable mesh to keep your pup's body temperature cool.