You are correct, they are boot trees. They go in the top part of the boot (the upper) to keep them standing up straight and not developing creases. You would also use standard trees in the boot for the vamp.
A big thank you to Workthatwedo for leaving this great silk Samualsohn coat for me. FYI, they also had out a Zegna and Hicky Freeman orphans (couldn't find the pants) and a moth eaten Aquascutum.Excuse the lousy photography, I am no Dig. [[SPOILER]]
Well I now know where you shop thanks to the orphan and Aldens. That is one of my favorite stops.The houndstooth wasn't out yesterday though, so I may have to run over and check that out tomorrow.Send me a PM if you want to compare notes on the OTP shopping.