Easy to use. Simple to clean. Made with a super strong flex-poly strap, the all-weather Collar is comfortable and functional. - The Wild One Collar is dirt and odor resistant - Collar is flex poly coated webbing with zinc alloy buckles - D-ring is coated carbon steel to minimize the noise of jangling tags - The Large Collar is for 15-18 inch circumference necks - Large fits most German Shepherds/Retrievers/Pitbulls - Hand wash with mild soap and warm water