I recently purchased a pair of Infiltrator pants (along with the jacket). A couple days after arrival I had the opportunity to put them to the test. 5 hours of rain in 42 degree weather. I was wearing them over a loose fitting pair of BDU pants. They fit a little snug in the legs but I think that was because of the slightly over sized pants underneath. The draw string on top of the elastic is very nice around the waste. They performed flawlessly in the rain and were easy to get on and off because of the high zipper up each leg even with large boots on. This system is pricey but if you are looking for high quality and something that will keep you dry in adverse conditions, it will be money well spent. You get what you pay for. Highly recommended.