The right clothing will keep you cooler in hot and humid climates or keep you warm but not sweaty in cooler climates. It will be stretchy and allow you to be comfortable when trekking around, sleeping in your clothes, or climbing onto the top bunk of a train. It will pack smaller and lighter (big win!) and won't wrinkle. It won't get smelly (as quickly LOL), will wash easily and dry quickly!
So what does performance clothing mean? And where is the best place to buy it? And what am I going to look like in my Instagram photos?!Performance clothing has certain features built in that makes it way more awesome than, say, a basic cotton t-shirt. The features are either in the design or the in the fabric itself. Key words are:
• moisture-wicking
• 4-way stretch
• UPF sun protection
• lightweight
• 4-way stretch
• UPF sun protection
• lightweight
• quick-dry
• wrinkle-resistant
• anti-microbial (for odor control - yep)
• breathable
• wrinkle-resistant
• anti-microbial (for odor control - yep)
• breathable
For the most basic example, when thinking performance clothing, think REI. Brands such as ExOfficio, Columbia, Royal Robbins, PrAna, Toad & Co, Patagonia, and the North Face have great performance features! They are expensive but will last you forever.
Where to buy it? Well typically not REI but they do have great sales, an outlet section (REI Garage), and even a yearly garage sale where I'll snatch up some extra garments for super cheap. Look for the technical brands at places like MooseJaw, Sierra Trading Post, and Backcountry. You can also check sites like GearTrade or EBay for used or seconds.
Golf clothing is usually great for hot-weather travel. It is focused on movability and regulating body temp. Maybe not as much for the type of comfort you need when curling up in a bus seat for 12 hours, but they still have some incredibly light-weight performance fabrics. Climbing gear is a good choice too. It will be stretchy and high-tech.
Outdoor outfitters and places like Lands End also have super quality performance clothing and great customer service. Look for sales though.
Lucy has some pretty cute stuff but it's also not very rugged. I love my Get Going capris but they snagged the first trip I took them on and pilled up like crazy. But I still wear them because they are comfy and cute. Athleta is okay but sometimes the quality lacks for the price.
You'll also want to avoid clothing that shows sweat. Your best bets are black, white, or patterns.
It's true that there's a slider with "performance" on one end and "cute" on the other. The closer you get to better performance, the further from "cute" you get. I used to go strictly for function but I got sick of looking like an old-school wilderness explorer. Especially now with the internet everywhere, you are no longer off the grid when you travel.As far as the locals are concerned, it doesn't matter too much what you wear in most places (as far as fashion), but I do like feeling remotely normal sometimes. I usually bring at least one cute-ish dress and a top that doesn't look like a boy's t-shirt.
I have found PrAna and Royal Robbins to have some tops and dresses that perform well but still have some femininity.
Typically the more you spend (or at least whatever the suggested price is - if you do it right, you won't be paying full retail!), the longer it will last you. So you can decide what is worth investing in or not.
Some travelers like to buy most of their clothing once they land, or to bring clothing that they can throw away at the end of the trip. That just doesn't work for me. I work so hard at collecting just the right travel clothing pieces - I can't imagine them being disposable. Not just because they fit a need, but because they are likely not super cheap! It's fun to get a pair of $3 elephant pants to bum around in, but I would not base my wardrobe on that!
And don't forget your sports bras and travel undies, too! See The Undergarment Strategy.

It's hard to resist a $3 pair of comfy elephant pants on Khao San Road. They might not last long but it'll break the outfit monotony for a time.