The regular kirby replacement shakeout bag that is black is best shake out bag. The other shake out bags from kirby are okay nothing spectacular. Compared to any bag except black kirby bag I would say there is little difference if any.
He was asking about 505. I agree but vacuum bag for his model was top closure shakeout but if he has a 505 top fill looks alot better.
But yes 562 sanitronic black bag is best shake out.