I purchased these to help with the Hedd Phones. They are heavy and the headband inadequate at least for my head ( I have a bit of a peak). A better solution would be to use Sorbothane(polyurethane) with a 40-50 duromenter which I have been using. These appeared to be a more elegant solution but the memory foam (maybe?)which they appear to be filled with can't handle heavier loads. They completely collapse making them simply a load transfer device rather than a load dissipator.