THIS PETGUARD NATURAL HERBAL DOG COLLAR IS A UNIQUE OPTION THAT LOOKS AND SMELLS GREAT. OUR COLLAR UTILIZES A MIXTURE OF AROMATIC OILS SUCH AS ROSEMARY AND CEDARWOOD THAT BOTH HUMANS AND PETS ENJOY, AND ITS EASILY DETECTABLE RED COLOR COMPLEMENTS ANY FUR COLOR WHILE INCREASING A DOG'S VISIBILITY. THIS BOX CONTAINS ONE NATURAL COLLAR THAT FITS NECKS UP TO 22 INCHES.