The fit with the hood is just perfect for me, seems to dry more quickly if I sweat. Don't get me wrong I wear the heck out of the FL Merino, have one of each weight for many years. The sleeve length and overall fit of the Kuiu I think just fits me better, and it's in Valo pattern which works well where we typically bow hunt so I can just wear it as an outer layer when it's crazy hot. FL hoods seem more like an after thought whereas the Kuiu hood is very functional and moves with my head and keeps the sun off my ears. I typically wear the hoodless FL base layers out West where I'm using a heavier Merino on cold late season hunts and the Kuiu 145 if it's a warmer day or down here in Texas. I've never been able to wear the FL Furnace though, I've never been cold enough to make it work.