The Knot-a-Collar(TM) distills design and durability cues from the crag into a clean and elegant collar solution. It&';s low-profile to settle comfortably in short or long fur and reduce matting, and the sliding fisherman&';s knots make it easy to adjust. Integrated reflectivity boosts visibility in low-light conditions. Packed full of Ruffwear&';s signature collar features: separate ID tag attachment point, a silicone tag silencer, and a strong leash attachment point for a confident connection to your dog on-leash.Low-profile 7mm rope with reflective trim settles comfortably into fur Sliding fisherman knots are adjustable for a customizable fit Single-piece, anodized aluminum V-ring provides a secure leash attachment point Easily add or remove tags with Quick Ring(TM) Separate ID attachment point Silicone tag silencer 7 mm kernmantle polypropylene rope with reflective trim Anodized 6061-T6 aluminum V-ring and belay plate Silicone tag silencer Hand wash Mild detergent Air dry