I have a pack as well, though I haven't shot them. And that is exactly why. I didn't think they would stay closed either, they open so easily. I'm not all that happy with the design, good luck changing one of those bands, that they say you don't need.......LOL.....

I couldn't figure that out, No rubber band required, but there it is, plain as day, and great big "shock absorbing ring".........AKA, rubber band....Think I'm just gonna stick w/ the Hammerheads....