Hockmasm,
I will add a cavet. IF THIS IS THIS YOU ONLY TRIP, then forget about buying anything special.
However, if you are going to do more traveling, THEN HELL YES, DONT BE A TIGHT WAD AND INVEST in some "travel" clothes.!!!!
Im going on my 4th day without most of the clothes i brought/bought.
I recently bought some replacements pants, shirt, sox and underware. Just enough to get me by without having to do the wash everynight. Just be happy you can buy those ExO pants for 40 USD. I would be more than happy to pay that much. Those ExO pants and alot of US goods are way more expensive here!!!!
The laundrymat in prage gave my clothes to someone else and i wasnt able to stick around for them to show up if at all.
I was leaving the next day and spent much of the following DAYS looking for some replacements. Looking for clothes wasnt my idea of a vacation!
In the mean time. Guess what i was wearing. Just the clothes on my back!!!!
luckly, i had bought and tried some marino wool underware and sox. Those were washed in the sink every night and were dry or dry enough to wear the next day. The pants and shirt are quick drying/moisture wicking and were washed on every third day. They would be dry in the am.
You may THINK that they arent needed until you do. But again, if this is your one and only trip...
Happy trails