3/8" x 25' Black Continuous Roll (No Cuts) **NO SPOOL** Made in the USA High Tenacity Woven Braided Outer Jacket Harriscos LLC Heavy Duty Shock Cord. Our shock cord has a threaded core that consists of tiny strands of premium grade rubber that is covered with a Heavy Duty woven braided outer jacket that is UV resistant. The woven braided outer jacket is rough enough to hold a knot and is designed to not become slippery when it gets wet. Great for truck tarps, boat covers, pool covers, farm equipment, canopy tarps, camping, auto racks, sports activities and any other general application where you need a high quality stretch cord.