I bought 2 pair of Salomon shoes for the UTMB. The S Lab model, and the XA pro 3D XCR model (which I tested last year for the Courmayeur- Champex - Chamonix trail).
Despite the fact that the 2 models look very similar, I feel many differences. The gaiters (see the black part on the shoes), which may look very usefull, have a negative effect on the back of the feet. In fact, after few kilometers it hurts. While, running the 14 km trail of sunday with the XCR model, I had not any problems, despite the fact that I have not run one km before the trail with this pair of shoes.
So, I would like to warn the people who think that, if they are ok with the XCR model, it'll be ok with the SLab model, it is not the case. I guess I'll find the right way to use the SLab model, but today, I can say that I will not use it for the UTMB, but I'll keep the XCR model.
Also, speaking about the socks. I bought one year ago, some special trail socks from Salomon. I really like this model. So I bought this year, the new model. During last sunday's trail, I put these brand new socks on my feet. And at the arrival ... A HOLE !!!
I'll send them back to Salomon, because it is not acceptable to have such a problem with a pair of socks made by Salomon, used with Salomon's shoes, and after only 14 km ...
Not really easy to check and prepare the equipment to use for a 160 km trail ...Not all the brands and models are able to support the test :-)