Yes they are. II wear them in my treksports and they fit perfect. Just keep in mind that a new pair of vibrams will fill too tight with injinji socks. But once they have been "broken in" then you will be fine.
Great product by under armour but the first time i put them on, they where etching my skin for a while, but now they don't bother me. They do tend to rise up on you. I wish i could of ordered the 9" for that matter. But other than that i love them. They are great for sweaty activities!
I just got this pack and im already liking everything this pack has to offer, this pack seems well made and durable. there are ton of space in it. my fiance has a 55L and this 60L Lafuma seems so much bigger for just 5 more liters. The pack has nice deep side pockets that will come in handy for our trip in the Rockys, cant wait to use it.