Our 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 are made of 302 stainless wire and provide superior strength and durability. 300 series bands are the life blood of XHD Series. They feature a 5/8" outer diameter and pack more punch than the standard 9/16" bands.