The Doggy Dickey Fleece Neck and Chest Warmer for Large Dogs, XX-Large, Safety Orange Chest size 35.5-40.5 Inch Example breeds: Mastiff, Doberman Pinscher, Great Dane, Rottweiler, (chubby Lab) 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