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 UV rays, prolonging sling life. Wishbones are 302 stainless wires that provide superior strength and durability.It comes packaged in a "FRESH PACK" bag which keep the sling in its best condition for the ultimate in power and longer life.