From the patent office, Apple patented the flowing –

“On August 28, 2014, the US Patent & Trademark Office published a patent application from Apple that reveals an improved method of producing a lightning connector that has a newly defined breaking strength. This new feature will be able to protect the receptacle lightning connector and/or the electronic device from damage when a force is applied to the lightning connector. One of Apple’s patent figures specifically presents a new docking station utilizing this new feature.”

So a more flexible lightning cable that doesn’t break when pressure is applied. I know of a few people who have broken the ends of the cable, but to date this have never happened to me (yet).