Soft Lines PSW20420PACIFICBLUE Floating Dog Swim Slip Leashes 0.25 In. Diameter By 20 Ft. - Pacific Bllue Strong hand sewn webbing connections. Releases knots easier than nylon or cotton ropes. Excellent resistance to rot and mildew. Excellent resistance to acids and alkalis &#40;salt water&#41;. Very good resistance to oils and gas.