A mixture of premium doe estrus urine from at least (3) different does. Makes a buck react faster. . Harmon Triple Heat Cass Creek Harmon Triple Heat Female Deer in Heat Guaranteed to be the hottest "Female Deer in Heat" lure on the market today! It has long been known as a proven fact by biologists, that deer identify other individual deer by scent. Because of this, Harmon has now developed "Triple Heat". It's a mixture of premium doe estrus urine from at least 3 different female deer in heat. The buck can now identify at least 3 different does in the area. Because of this he will react faster and remain in the area longer. This is 100% urine to get that Trophy Buck you have always wanted. Keep away from children. Never ingest. Keep away from eyes.