Polyethylene and Dyneema combine for added strength and a slick design constructed from neon Green polyethylene and white Dyneema in a striped design that offers high visibility. Dyneema core gives this throw line added strength. rot-resistant line has good memory for recoiling. this 2.5 mm rope glides easily in the hands. average tensile strength of 450 lbs. Dyneema is a registered trademark of dsm Corp. 2.5 mm x 180.