The ComfortFlex Sport Harness offers you and your dog only the highest standards of safety, simplicity and security. Unlike many harnesses, the ComfortFlex Sport Harness is designed to protect sensitive areas, like your dogs throat and underarm, during any level of exercise. Due to the dynamic position of the leash connection, pressure is always directed directly to the chest, never riding up on the dogs throat. The simple yet effective design also lets your dog retain a full range of motion without having to worry about underarm irritation or chafing. Getting your dog into this harness is incredibly easy. Just drop it over your dogs head, secure the Velcro strap around his girth and connect the safety snap. With very little practice, this can even be done with just one hand. Reflective Nylon strapping is easily seen in low light situations. Machine wash/Line dry. Made in the USA. Sizing & Color Size Girth Breed Petite 12-15" Chihuahuas, Minatures, Teacups, etc. XXS 15-18" Chihuahuas, Minatures, Teacups, etc. XS 18-20" Terriers, etc. S 20-23" Shelties, Pugs, etc S/M 21-25" Shelties, Pugs, etc M 24-28" Border Collies, Aussies,Spaniels, etc. M/L 27-32" Border Collies, Aussies,Spaniels, etc. L 28-33" Labradors, Golden Retrievers, etc. XL 32-36" Shepherds, Rotties, etc. XXL 37-42" Giant Breeds Berry Kelly Red Purple Bordeaux Blue Jay Hunter Orange Mariner Saffron Raven