No need to size up
Actually I agree quite the opposite of sizing up. Yes they at first the band can feel quite tight around the forefoot but they will loosen slightly over time and fit your foot better. I normally wear a 10.5 or 11 in most shoes. I have tried 10's before and my toes were hitting the front of the shoes and I ran the risk of toenail damage. With these I tried them on in the store and I fit perfectly in a 10. That is including with and without socks. I choose thin socks, but socks none the less. My toes are right at the end of the toe box (right where they should be in this type of shoe) but not mashed up against it. I have not used these for very much trail running but I have done street running and some backpacking in them and I could not be more pleased. They are an excellent shoe and I would recommend them to anyone that is looking. I have tried 5 fingers and they gave me pretty significant blisters, and with the fabric between the toes, prevented my digits from splaying out properly because I had to fight the fabric. These are not that case. Tight around the fore-foot and a wide toe box create a very nice atmosphere for my feet. Definitely a 5 star shoe and I have plans to keep buying them each time that the old ones wear out.