This is a dyneema braid with a translucent soft skinned polymer coating and will striaghten out without the need to heat or steam. It has a smooth weaved core and is very fast sinking. It is available in weed green and gravel brown at 12lb, 15lb and 20lb breaking strains. On 20 meter spools. Dyneema is considered to be the worlds strongest fibre and is UV and chemical resistant.