Perimeter Technologies Dog Fences are the only containment systems that provide comfort contacts. Keep your pet safely contained with a more gentle touch with Comfort Contact on Perimeter Technologies Dog Fences. Perimeter's Comfort Contacts provide pet containment systems with a difference dog owners can feel! Perimeter Technologies Dog Fences are a thoughtfully design a containment system for pets that include features to make it safer and more comfortable too. As a pet owner, you want the best for your pet. Perimeter's exclusive Comfort Contacts cushion the pet's neck with a soft rubber probe unlike the hard steel probes used in other pet containment systems. Veterinarians prefer the softness of the Comfort Contacts on Perimeter Technologies Dog Fences because they help to reduce the incidence of skin irritations that occur with prolong use from the steel probes other collars use.