wear layers under these i had leggings, hiking trousers and then these on top; the trousers leaked a little but barely noticeable (NOT completely waterproof but do a darn good job!), i was kept dry and warm and they are wind proof too! I spent a whole day in hail and rain and came home with few wet patches on me! stamping through bracken and gorse didn't tear them either i was IMPRESSED!
i'd recommend these (and the jacket too) as a barging buy for any keen walkers or students that take a course involving the out doors, they fit over anything! (maybe a bit long for some people so need to tuck them in or cut them)
THEY PACK UP SO SMALL! (which is helpful when you have a lot of other equipment to carry!)