Not quite smudgeproof, unfortunately. I wanted to like this mascara as it does wear better than others I've tried. However, I felt it left my lashes looking so strange. Rather than looking smooth, the volume aspect of this formula left my lashes looking rough and clumpy. It also lead to a lot of flaking when applied. Definitely a clumpy mascara if built up, so it's good if that your jam.
As a gal with oily lids and a new found tendency for watery eyes, I've always been on the lookout for a mascara that wouldn't transfer down to my under eyes throughout the day. For the past week and a half, I've been trying out this mascara and been pleasantly surprised. The flexible wand takes a bit of getting used to, and you can be left with a bit of flaking upon application, but this mascara doesn't smudge on me throughout the day. It can be a bit clumpy, but i prefer more natural, feathery looking lashes. Someone with a taste for thick, dramatic lashes would especially love this formula. It does crumble away in the shower, so don't wear this mascara when swimming or when it's especially rainy out.