The quality of the materials is amazing to me. I'm used to $25 dollar umbrellas. This feels like "rubberized silk".I got this to work with my Elinchrom 600RX and am very happy. It slides in and out very easily but there's a rubber piece inside the 600RX hole that prevents it from slipping once the weight of the umbrella rests on it.The light is very soft and I'm very satisfied with the performance.