I grew up in a mountain town where we skied nine months out of the year and then hiked the other three months. The weather in the Pacific Northwest is famously unreliable, so fleece-lined leggings have become my favorite hack for both leisurely and rigorous activities. Fleece-lined leggings have a soft interior for insulation and a stretchy outer layer for breathability so you don’t overheat, which makes them the ultimate pair of pants for cold-weather travel. We tested 31 pairs of leggings while hiking, lounging, and sightseeing and evaluated them based on quality, performance, fit, and value. I own more than 20 pairs of leggings myself, and have worn them in countless occasions, including while hiking in rural Iceland and enjoying après ski in the French Alps. Keep reading to see which pairs we loved after testing. Top Picks Why We Love It These leggings are warm, comfortable, and don't pill after washing. What to Consider They run large around the knees and ankles, so we recommend sizing down.…