Hard to tell from the photo, but it doesn't look like they open up all that much. I have two pair of the older Nike "touring" shoes (a lot like slippers with SPD cleats), and they also are stretchy stuff, but are FAR from quick to put on or take off. Couldn't imagine doing it with wet feet. Granted, mine do not have a large opening at all, but I've used them for road racing, not tri. When I was racing tris, I always made sure my shoes opened WAY up. I'm not saying these PI shoes are bad, just something to think about when you try them on.
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