Ever since an airline lost my luggage once, I refuse to check bags on the way to my destination.  This can make things complicated, as I usually travel internationally for 3 weeks at a time.  My boyfriend told me about exofficio before a trip to Europe last year and I bought a pair.  They are AMAZING!  Super comfy, wash in the sink, dry in a few hours, good to go!  Also, it's really great that they are moisture wicking because I usually get pretty sweaty hiking all over whatever new city I am exploring, usually in the summer.  I just bought two more pairs, for a total of 3, for a trip to Thailand.  This should be more than enough!  I also bought the exofficio give-n-go tank which is the same exact material as the undies.

The only reason I am not giving a full 5 stars, is that for the price, I would expect them not to pill.  I think handwashing always, instead of machine washing helps this.  Overall, it doesnt bother me much, as in general I save these underwear for traveling and for hiking locally, not everyday wear.  I want to make them last for 10 years!  Another tip: when traveling big a ziploc bag of powder laundry detergent to wash these with.  I find it works better than shampoo/ hand soap.  Forever new is a good, gentle brand.

Overall, if you need good underwear for traveling I HIGHLY recommend a pair, or two of these.