The only buck attractant that is vaginally extracted from individual does that are in the peak of their estrus cycle. We now have a collection process so unique to this industry that it is patent-pending. We actually synchronize does with hormones so they super ovulate, resulting in a higher volume of pheromones. Each doe is then tested to ensure she is at the peak of her cycle. The vaginal secretions are then collected along with the pheromone-saturated urine, thus creating our VS-1. There is no other Deer Scent product like it on the market today. Our unique collection process of the does vaginal secretions and estrus urine at the peak of her cycle makes VS-1 the most powerful attractant ever produced. It is 100% pure and must be refrigerated. VS-1 is shipped starting at the beginning of September. Very limited supply and has sold out every year! Directions for VS-1 Liquid Recommended to be used with our scent sponges. Apply 6-8 drops to scent sponge, hang 3-4 sponges from low limbs in and around primary scrapes, rub lines and high traffic areas during the peak of rut. When done hunting, take sponges down and store in ziploc bag in refrigerator. Just add a few fresh drops to sponges when returning to hunt.