So I bought some bands on Ebay... two jump stretch bands "with no cracks". However I just got them today and this is what they look like: regions of small cracks... some of them running 1/3 of the way through the depth of the band.
See the pic
Are these bands any good? The last thing I want to be doing banded squat and these things break on me. I don't know what a usual level of wear is... any suggestions/help?