Features Sizing Materials and Care reflective, low-profile, adjustable 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. KEY FEATURES Low-profile 7mm rope settles comfortably into fur Sliding fisherman knots are adjustable for a customized fit Single-piece, anodized aluminum V-ring provides a secure leash attachment point Anodized aluminum belay plate provides non-slip adjustment Separate ID attachment point Easily add or remove tags with Quick Ring™ Silicone tag silencer to keep dog tags quiet Enhanced visibility with integrated reflective trim Made in Vietnam Around Dog's Neck Measure around the dog's neck where the collar would naturally lay M Neck: 36-51 cm (14-20 in), Width: 25 mm (1 in) L Neck: 51-66 cm (20-26 in), Width: 25 mm (1 in) Materials 7 mm kernmantle polypropylene rope with reflective trim Anodized 6061-T6 aluminum V-ring and belay plate Silicone tag silencer Made in Vietnam WASHING INSTRUCTIONS Hand wash Mild detergent Air dry