My old carry-on was a nondescript Jansport model that weighed in excess of 10 pounds. Definitely not feasible when the international weight limit for hand luggage is just 17.5 pounds! So Rico and I set out to find new, super lightweight carry-on suitcases.
After much research online, we decided to go with the 22" Antler Size Zero, which weighs a mere 5.3 pounds. I'm not used to paying $199 for a tiny little bag, but I can say with confidence the price was well worth it. You can fit a surprising amount of stuff in the suitcase, and it is very cleverly designed. I got the bronze color, Rico got black.
10 out of 10 stars, in my book.