Just wondering whether there is any benefit in sizing up on the Patagonia houdini?
I've just received mine (size M) and although the R1 pullover fits underneath nicely, I wouldn't like to try and squeeze anything else under there (eg. another fleece layer or a down jacket).
I assume the intention is for a trim fit, and only one or two layers underneath, but has anyone found it useful to go a size larger? Conversely, is there an advantage in keeping a trimmer fit?
Thanks, Ashley.

