The Spro Trout Master Caviar consists of elastic caviar balls made from medical-grade soft plastic. They are infused with an attractive scent that can be revived by simply stretching the material. The super-soft material holds exceptionally well on the hook. Caviar can be placed directly on the hook or positioned in front of a spoon using a bait needle. The balls are highly buoyant and can be used to adjust the running depth of your spoon or fished as a simple pop-up on the bottom. Caviar comes in small PET cases to protect the bait and the scent. The material is extremely durable, allowing for a large number of fish to be caught with each ball. In the event of a snag, the soft bait will dissolve over time in the water. This is a bait that no professional trout lake angler's tackle box should be without.