I like to commute in my work pants when it's cold enough (under 55). Once it gets too cold, I wear a pair of leg warmers underneath (around freezing). I got the leg warmers from my LBS last winter & they work great, I put them on underneath my work pants & when I get to work, I can pull them right off, without taking off my pants. They are windproof, so they work really well for my uses. It's usually much warmer on the ride home, so I don't wear them both ways, but if I did, I imagine, I would need to pull of my pants to put them back on. Once they're off, they roll up really small & I forget about them in my bag.