At the heart of Kraken is a polyester core, giving it it's high strength and robust feel. The jacket is a tight braided polyester that gives Kraken amazing durability, without making it feel brittle. In fact, Kraken is quite flexible, and resists kinking, twisting and hockling. Kraken's construction makes it easy to splice, and it functions very well in standard rigging setups as well as knotless rigging setups. You'll also find that Kraken mitigates shock fairly well, although Dynasorb is still the king when it comes to energy absorbing. Available in 6 diameters ranging from 3/8-inch to 3/4-inch.