The phottix pro easy up hd umbrella softbox with grid 90x90cm is made with internal white fiberglass spokes for high durability perfect for on location shooting it folds down like a regular umbrella but expands straight into a square softbox for instant use saving time over traditional softboxes which require rods and speed rings for assembly the recessed front diffuser allows for more precise positioning and feathering of light included is a removable grid to better control light sp