Materials used: Nylon.

Size Chart:

Small-

Neck 20 - 26 inches, Chest 18-22 inches, Aprox Dog Weight Up to 50lbs

Large-

Neck 26 - 36 inches, Chest 22 - 28 inches, Aprox Dog Weight Up to 80lbs

PLEASE READ BEFORE BUYING: IT IS ILLEGAL TO IMPERSONATE A SERVICE DOG. HOUSE BILL 2588 INTRODUCED IN 2018 STATES THOSE WHO FRAUDULENTLY MISREPRESENT SERVICE ANIMALS CAN BE FINED $250. PLEASE NOTE THAT THERE IS NOT ANY LEGAL SERVICE DOG REGISTRATION IN THE UNITED STATES AND THEREFORE NO SUCH THING AS A "REGISTERED SERVICE DOG" WITHIN THE USA. BY PURCHASING THIS ITEM WITH THE INTENDED USE TO IDENTIFY A SERVICE ANIMAL, YOU UNDERSTAND THE ABOVE.