I just purchased the Orvis dropper fly box that allows you to pretie dropper flies at home. In the product description it refers to the Orvis modified loop knot to tie on to the dropper line so you can simply add the dropper fly on the water. It sounds like a simple noose.

Does anyone know this Orvis modified loop knot and how to tie it or can refer me to a place to see instructions on this or any fishing/noose knot?

Thanks for your help.