The Phottix Premio Black Backing for 33/85cm Reflective Umbrella is designed to enhance the performance of your umbrella photography lighting setup. This high-quality accessory attaches easily to your 33-inch or 85cm reflective umbrella, providing a black backing that helps to control light spill and increase light output efficiency. The black backing helps to prevent light from escaping through the umbrella, directing it towards your subject for more focused and professional-looking results. Add this Phottix accessory to your gear collection to elevate your photography lighting game and achieve stunning shots with ease. Ideal for photographers looking to enhance their umbrella lighting setup.