Here's what Whirlwind says about the Standard Leader Jack to Jack Cable:
There's not a performer out there that doesn't bend, pinch, or tangle their cable. That's why Whirlwind invented the Leader Series.
Premium, rugged, and practically indestructable, the Leader plug's patented cable grip absorbs any typical straining in the field. And its flexible boot extension has virtually eliminated breakage at the cable exit. Combined with Accusonic+1cable, the Leader is the highest quality instrument cable manufactured today.
There are musicians that have owned their Leader cable for over 20 years and it's still going strong. But in the rare occasion something does go wrong with your cable, Whirlwind have a no-quibble lifetime replacement policy.