The Pace Glove 2 run about a half size larger than the original pace glove. I have a medium to high arch, and a high instep (the top of the foot above the arch). When tied they feel different than the original Glove, but not unpleasant. I had to play with them a bit to get them just right. There is no longer an elastic back at the achilles. It is now a normal back. It does gap slightly around the side of the foot when I step, but it is comfortable, and I really don't wear mine for trail running (I could see it being an issue then). Overall I still LOVE the shoe. I need to break these in yet, but so far so good!! For reference: I have been wearing the pace gloves since Merrell first advertised them. I wear them mainly for crossfit and running, and sometimes for yoga when I am in other countries and there are no mats. They have been an excellent all-around fitness shoe.