They don’t appear to be non-latex. While you are not required to have non-latex, I highly recommend it. They will retain their stretch longer, and will be less affected by leaving them exposed to air. Here is a thread I started a while back about which variety. Be sure not to revive it by replying. As far as legality, the exact material doesn’t matter, it’s just the size, which has to be #64 or #32.
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