This design has been all the rage for several years. The unique design allows for a shock absorbing action and allievates some pressure to ankles and knees. We carry several high quality brands of thesestainless steel irons including Metlab, Intec and Korsteel Rubber cover on joints is black, gray or white. For quickest delivery we will ship what is in stock in your size at the time of your order. However if you have a preference please note it at check out under special instructions.