I was hesitant about these pants, but they are the greatest!  I am small, size 4, so I had to return for the xsmall.  Coolibar company was a pleasure to work with and I had my replacements in record time.  The service was exceptional.  Theses pants fit perfectly.  The first time at water aerobics was full of compliments and wantings of the complete outfit.  They are so light weight, you don't even know you have them on.  They do not ride up!  The matching top is a must!  Yes, they are pricey but so worth it.  I will definitely order more.  Thanks Coolibar, for these awesome sun protection suits.