I must say I'm not very happy with the Hoodman. Its in a oval shape on the to bit, and seems reluctant to curve more round to fit the eye socket better. And with the eye piece underneathm it just squashes it and doesnt let your eye socket fit nicely onto it, so instead it doesnt fin nicely like the standard eye piece, Sure it may help remove fogging from sweat, but its not comfortable especially considering the price. Bit of a rip off and I'm not overly impressed. Even in one part the stitching is poorly done, so obviously not even a good machineist made mine!!!
Must be a better option to avoid fogging and sweat than just the hoodman???