The Ruffwear Knot-a-Collar™ is a unique approach to dog collars. The low-profile design provides a clean and elegant climbing-inspired solution for an everyday collar. The all-metal hardware keeps dogs secure. Reflective rope keeps dogs visible in low-light conditions. Round profile settles comfortably in short or long fur and reduces matting. Try our matching Knot-a-Leash™ for the complete set up.