Unfortunately, the title of these pants is -mispeld. They are Capilene - a trademark of Patagonia. On top of that, they are one of the longest lasting pieces of clothing I''ve ever had. Many years ago, they were made with the same fleece as Patagonia expedition weight underwear but styled like sweatpants. I''ve worn mine on numerous climbing trips and while training for multiple marathons. They never wear out, they don''t hold odor, and they dry out super fast. You can layer them under ski pants. They perform superbly as cross country ski pants (particularly if you sweat as much as I do). Best of all, the pockets have a patented feature where change or house keys won''t slide out when you sit down. Everyone should own a pair

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Lowe Alpine, North Face, Marmot, and Mountain Hardwear fleece pants

These are very warm fleece pants. I have hiked in them alone on 15 degree days and love them around camp. I would have prefered side zips to make them more comfortabel in a wider range of conditions. Good quality stitching.

These are basically expedition weight Capiline long underwear bottoms that are tailored for use as pants (no fly, two side pockets, one zip back pocket). They are extraordinarily comfortable. I use them under gortex shell pants for alpine skiing- they are just the right weight, and I can walk around in them in public without the shell (unlike the long underwear!) They wick like crazy, and never get clammy from sweat no matter how overheated you may become. For back country use, side-zip pants are better, but for lift-served skiing this is the ticket (no pun intended). With a pair of midweight capiline bottoms, these are warm enough even for skiing in the east.