What is the toughest dog toy?

I own two dogs, a shiba inu & a shorkie (shih tzu yorkie mix). I've tried Kongs, Tire Biters, Rawhide & many 'tough' plush toys. However they never last more than 10 minutes! I've spent anywhere from $2 on a toy to $20 only to find that no matter the price, they don't last long enough to hold their attention. My shoes, socks & anything else they can find (including the wall!) is in great danger since these toys don't last! Does anyone know of a chew toy that will actually last longer than 30 minutes before I have to throw it out because it has been ruined? Thanks!