They didn't look too bulky for thicker trousers. I went one size larger than I usually wear because my size fits well, but I wanted a little more room as they don't really stretch. Even with the increase in size, they didn't seem too big or chunky. So I say if you want a tighter yet comfortable fit, size up. If you need some space to fit thermals or something underneath, go one size up. Haven't worn them in the cold yet so can't rate this piece accurately (I bought it for a winter trip). That's why I didn't rate them 5/5 stars. In fit, style and everything else they seem to be 5/5.
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