In reply to Brian Pollock: Hi Brian. I have a pair of rebel ultras. These boots are designed to give a snug technical fit. Superior comfort for a boot of this caliber. Super light too.
In respect to sizing, I have a pair of Sportiva Trango s evos. and I'm 43.5 in these.
I'm 43 in Rebel Lites, but a 43.5 in the Ultras. This takes into account a slightly thicker sock.
The Rebel Ultras are not as warm as the Phantom guides/ Batura 2.0. This does give the option however for using them for Summer Alpine a well as Cascade/ Scottish Winter.
If you can find some to try on you won't want to take them off.