Profoto 505-708 4-Feet x 6-Feet Softbox (White/Black) Tough and resistant outer fabric, guaranteed to last for years and years of heavy duty use High-quality steel rods holding the structure solid and keeping its shape, even after a lot of shooting on location, packing and unpacking, etc Internal silver coating, optimized for maximum light reflection Maximum resistance to UV light, preventing the diffusers from going yellow Heat-resistant materials in every part of the tool, to cope with the heat generated by the lamps.