Ideal for use by commercial fishermen and by pleasure craft owners. Manufactured from the highest quality marine grade vinyl. Feature an improved valve system for easy inflation and the prevention of leakers. Heavy-duty molded rope eyes feature a large radius, combining strength and stability with less wear and tear, even if you're using shackles. Strongest rope eye in the industry; Ideal for use with shackles; Superior valve design, conveniently located in the rope eye for increased durability; Single valve system for ease of inflation and deflation also helps prevent leaks and stripping