I love my Railrider pants. They are showing little sign of wear after 4 years of use. Nice deep pockets, bombproof fabric, nice features. The fit is loose by design and some people call them "bloomers". But I like the freedom of movement and the ability to layer underneath. They're not zip-offs but I can easily roll them up to my knees if necessary. They have double fabric in several places but they're still thin enough for summer use. They're not cheap but a good bargain if you think long term.
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If you only travel on sunny days you will never reach your destination.*

* May not apply at certain latitudes in Canada and elsewhere.