- Familiarity: I've used it several times
- Fit: Runs large
- Size Bought: 43.5
Looks like scarpa has upgraded these boosters and I'm thinking they are on sale to make room for the new models. I wear an 11 street shoe and the 43.5 fits like a glove. I wear a 43 in the Instincts, but wanted a more comfortable feel. These do not disappoint at 40% off. Great all around gym shoes. I climb v6/12a inside and have not popped off any holds with these.