The purpose of them is to make your shirt look like you're somehow magically preventing it from partially unbuttoning and creating a cupcake look . . They do a very good job - the clips are secure and stay on my feet. They're also quite comfortable (although they seem a bit odd at first) and I forget I'm wearing them. tighter pants and/or specific leg positions, but I think it's still mostly hidden behind the pockets, so I don't think it matters much. I don't think anyone will notice.
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