the O B stands for old bugger!!!This is what weve always known it as.The rim of the oss is wooden,then you have straps going across to keep the rim tight.We still use a form of sailcloth to cover the whole thing,which still weighs about 40-50lbs.And you know it after youve danced in it for about ten minutes.The teaser mask was only worn by the blue oss, the red oss never used one,but my grandad did dress as a women and also a mannequin once.