Purchased with the intent of bouldering in them. I bought the same size as solutions, and they fit noticeably tighter. This worked out OK, but it limits my use to performance climbing. I have pretty low volume feet, and even though these are supposed to be high volume shoes, they fit pretty well.
The combination of the leather and lace-up mean you can crank them down tight to get a fantastic fit - absolutely awesome.
The heel is weird material, at first it looked slippery, but it actually does quite well with heel hooks.
I don't love the huge toe box meant to house curled-up toes. I do prefer the Scarpa instinct low-profile toe box for sure. But the more soft/stretchy exterior doesn't let you crank down the fit in the same way as the Testarossa.
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