BLUE TONGUE represents a quantum leap in tree climbing line technology. Made out of premium grade polyester this 24 strand climbing line has been made for exceptional performance through mechanical ascent/descent devices as well as the traditional Arborist climbing techniques. The 11.7mm diameter provides the perfect balance between the weight of 11mm line and the feel of 13mm line. The highly vibrant colour guarantees exceptional visibility in the tree. It is possibly the most vibrant and visible rope on the market.