Add power to your strength with SPRI’s new line of Braided Tubing. Rubber resistance is redefined. SPRI has braided FOUR tubes together to bring you the ultimate dynamic full-body workout tools. Use the SPRI braided tubing indoors or out, wrap them around, under, over. They’re tough enough to take whatever you throw at them.The Braided Xertube offers all over the versatility of the Original Xertube and with its braided rope-like construction it is the toughest tube on the market.