JBL's unique latex formulation and dip manufacturing process delivers radical modulus strength. The power curve increases as bands are stretched for optimum performance. Special anti-oxidants help protect against harmful U.V. rays, prolonging sling life. Wishbones made from Spectra cord which provides superior strength and durability. Sling is designed for Other Manufactures Pole Spears, makes a great Save-a-Dive Kit Item and is covered by a 12 month limited warranty.