I have been touring Australia and New Zealand for a month with a single 18 lb bag. The shirt is one of several I brought as part of my minimalist approach. It is feather light, quite cool and easy to launder. It has proven to be perfect to the task.  It also looks very trim and tailored, so one can dress it up as well as wear it casual.  It does have one unusual feature: a narrow panel of mesh below each armpit that lets air circulate.  Be careful not to get these near Velcro--you will wish you hadn't.  I don't regard this as a design flaw since I'm the one who controls what mixes with what and Velcro has always given me fits.  Great shirt!