We insist that all our dog training students use these collars. These collars are smooth and quickly release, as they should. That way when the dog is correct, it immediately releases pressure. We teach our students to make momentary corrections so their dogs learn to walk nicely on a leash in heel position. No one gets dragged down the street! We purchase in bulk so our students don't have to get cheap collars at the box stores that snag and hang up.