The Doggy Dickey Fleece Neck and Chest Warmer for Large Greyhounds, Safety Orange The greyhound dickey has a tapered collar and longer chest plate to match the contour of your dog; (Chest size 27-32.5 Inch) Larger keyhole on the neck accommodates a martingale collar D-ring Fits over harness or collar & under any coat Perfect for thin coated, small & senior dogs who easily become cold Neon color visible in low lighting and woods for hunting safety