I usually don't like boy briefs coz they tend to ride up on me...I gave the ex officios a shot and I am more than happy I did.
They are featherlight, very comfortable and don't ride up. The best part is that they dry super quickly, which makes them a perfect backpacking/camping/hiking/traveling item. Since the fabric is so thin, keep em away from velcro!! I'm a size 8 and Medium fit perfectly.

The panties are utterly fabulous! So comfortable, light and breathable. Great on hikes, gardening, whatever...
I should have bought twice as many!

I've only worn once so far since I bought them. Wore them on a 20 mile backpacking trip for 3 days. Everything stayed cool and dry, and they stayed put, so I'd have to say they work great so far. As far as size goes, I usually wear a 6, and the small fit perfect.

I bought two pair at the beginning of the year. I travel so often and I'm all about comfort (why do some women wear high heels through the airport?), these are my "special airplane panties" as they don't wedge up, wick away moisture as I'm running from terminal to terminal and they are easy to clean/dry fast in the hotel room. Buy them, buy lots of them!

Great underwear! Very comfortable, even for long periods of wear.

Bought these in a small (I am a US women's size 4-6, or 27-28 in jeans) and these fit very well. The binding around the leg area is not too tight (will not strangle you if you purchase the correct size) and the waistband can't be felt at all... very comfortable. The only con is that you can kind of see the binding at the leg opening if wearing formfitting pants (yoga type) but for some reason, it's practically invisible in back while more obvious in front- reverse "visible panty line"! To me, not a big deal as these breathe like cotton but wick away moisture and dry fast like the synthetic they are- but, to those that insist on no lines under yoga pants, you may need to look elsewhere. I also have the Patagonia Active Brief and while those are pretty much invisible under anything (skintight or otherwise), they were a bit tighter at the leg opening and are far inferior to the Ex Officio line in terms of breathability.

I bought this product for travel usage so as to save space but ended up loving them so much that I wear them all the time. They are so comfortable, breathe well, and fit great. At first I was afraid they would be too practical and not cute enough. But my boyfriend loves them on me as well. I recommend this product to all my friends and anyone who wants to travel light.

I really love this Give-n-Go material. It always feels fresh and clean. The cut of the underpants is comfortable - for performance, though, I prefer the briefs or bikinis.
I recommend this product for traveling or even running around town - or as sleep shorts!! They are fantastic.

The are Officio-ly my favorite pair of underwear! Fit is perfect. I wear a women's size 8-10 pants and ordered a medium....perfect! These underwear unlike other underwear that get baggy around the leg after extensive wear, stay fitted and do not ride up. Just took these on a week long backpacking trip in wet northern california....they wick really well.
Never looking back!

I cannot say enough about these...for skivvies...these are so comfortable...and sexy! I highly recommend these. Sizing is true..I wear 2-6 , you know how brands vary and I ordered small... perfect fit. I love these, will be getting more.

I like these a lot--great for traveling, well sized, and they look awesome. even the elastic is comfortable after 24+ hours in an airport!

These are great - flattering cut (especially from behind), just low rise enough, and stay put! Love the butterfly print, too. I normally wear a size 2-4 pants and the xs fit perfectly.

for years i have been searching for the perfect underwear- you know, great for backpacking, can doulbe as a swimsuit if needed, comfortable, light, don't pinch or ride up. i found these a few years ago and despite loving them have tried others because these are so pricey. now after years of trying to find a similar cheaper model i am resigned and happy to tell you that these are simply the best undwerwear i could ever hope to fin. too bad they are never on super sale!

Honestly, for a boy cut skivvy, I swear these are the best. The fit and feel is awesome, they make you feel sexy and strong! For any activity, these Rule!

loved these briefs so much I got back to UK and wanted more pairs of them. Shame nobody told me about import duties.... I had to pay another £19 on top of the cost of the briefs!