Olivia,
I bought a pair of those convertable pants from Columbia sportswear. They are sized S, M, L so that might be easier.
I was going to get the Challenger convertable pant(39.99), but went with the Omni Dry Venture pant(44.99) because I bought the Million Mile Vest and it was the same fabric. There were some deals out there on the web a few weeks ago for last year's models, but I went into my local Sportsmart because I wanted to try them on for size. I went with the small.
