/ Do Scarpa Boostics stretch much?
As they are going to be used mostly for sport climbing, should I buy the tightest pair I could fit on (which were painful to walk in) and hope that they stretch, or buy a half size bigger and lose a bit of edging ability?
Get them tight, mine stretched quite a lot though they are quite painful when putting them on from cold during the break in period. I found keeping them warm helped a lot.
I found the edging to be the best part of this shoe and the heel to be pretty crap so definitely size them small to make the most of the edge.
Are you not concerned about having soles that are as stiff as boards? Sorry that this isn't helpful to your original question!
I think the instinct VS as a similar fit but at least they aren't TOO stiff...
On the flip side, my Dragons were never stiff enough for that and only ever get used on Spanish trips. Horses for courses...
I'll probably go for the smaller size, and hope they stretch enough to make them wearable on some longer routes.
I got mine to fit (comfy) and they didn't stretch. Apparently the Lorica has memory.
A fantastic shoe for all types of climber and climbing. They fit like a glove all around your foot and give lots of support and hence precision.
Instinct Slipper 2's are great too.
Agree with most comments.
Mine are street size and fit everywhere well. No stretch noticed at all and have happily climbed in them in the hot summer.
They are an amazing shoe, so comfy, yet brilliantly accurate to place and stick on the smallest of nothing holds!!! :)