3/8″ Waterlines feature bright yellow polypropylene sheath for high visibility and nylon DryCore for strength and minimum moisture absorption. The supple nature of these high floatation ropes make for easy stuffing and quicker deployment during rescues. Ideal for use in throw bags, as swimmer tether lines and tag lines. 7/16″ Waterlines features a double-braided high tenacity polypropylene construction for high strength, great handling and maximum floatation. Provides better abrasion resistance and a larger diameter for a better grip with a gloved hand. Ideal choice for ice rescue due to its higher strength and supple hand.