DescriptionFree Shipping on all orders over $99, also get same day shipping and no sales tax when you order from the Caddis Fly Shop! New from the folks at Yellowstone Fly Goods, Fly Duster is a great drying agent that works well with CDC and small fly patterns. We've come to love Yellowstone Fly Goods Fly-agra and Fly Duster is sure to become our favorite drying agent as well.