They should fit your boot nicely at a 9.5 / 10 size. The thing about most boots that claim shrinkage tech is that they are often a little smaller in terms of toe to heel measurement, but often the width of the boot remains the same. Thats where we tend to see problems with fit around the 9.5 mark with larger boots, because people are thinking that the boot is smaller overall, and not just in terms of one measurement.
Personally I rock 8.5 Libertines in L/XL 390's and they fit great.
Hey, thanks again for the quick response. I'll pick up the 390 Boss bindings in an L/XL. My first non-Burton binding in 20+ years of riding but change is good, right? Haha
Thanks NWBoarder but everything I'm finding on the Boss 390's is they come in S/M and L/XL. I've not seen an M/L option.
My experience is based on the Targas, but I think it's the same basic design. Rome doesn't make S, M, L, and XL. They make S/M and L/XL. The bindings are built of several connected pieces that can be adjusted to suit the size of boot. The setup is actually fairly complex compared to most bindings -- even worse than setting up Flows! Comes with a foldout chart that's basically wallchart-size. But once done, the bindings fit your boot quite well.
Coffee is your friend. Everyone else is an acquaintance.
I absolutely love my 390 Bosses. Mine are the '12 Model but I put on the strap system from the '12 Targas (yes I have both) which basically made the Bosses the new '13/14 model loool. Perfect to me; The flex and playfulness of the 390 Boss with the support of Targas.
I have size 9 DC Judge boot and the 2012 L/XL were a bit too big when trying to crank down super tight due to the smaller footprint..I ended up trading that out for the 2013 390 boss bindings in size S/M..i cant wait to try them out!
I bought a pair of the boss 390 at the beginning of the last season and on both the toe straps the ratchet release tab (orange piece on the white bindings) broke off. Also if your glove comes anywhere close to the binding while releasing a grab it loosens the strap. Had a couple of sketch landings since I inadvertently loosened my toe strap in mid air. The canting system is dope though and saves the knees.