We use these bands around rolled-up and folded newspapers for delivery. We have yet to have one break after being tossed. We are careful to make sure the band is not stretched near its limit and sometimes we place two bands on larger papers. For very large papers we use bags or heavy duty rubber bands. The only problem we have is that some of the bands in the bag are curled up; it can be irritating to have to deal with several curled bands in a row.
Last ones I bought from Staples would break the first use about 30% of time - seemed dry. I buy all such products at Staples thought I'd try one more time these seem "stretchier" so there's hope. My concern?Never had bad rubber bands before and never had bad Pentel pens before (maybe a dozen worked one day some I had time to return - clearly defective product as ink supply was fine.