Excelsior is a very commonly used product in fruit fly cultures. It provides additional surface area for the fruit flies, giving them added area to climb, mate, and lay eggs. Many customers agree that excelsior helps to provide superior results over coffee filters and other materials that have been used in the past.
Excelsior is made from a renewable resource and is also compostable.
This bag of excelsior is enough to make approximately 20 fruit fly cultures.