I go hiking and camping a lot, and my regular exercise pants just weren't cutting it in the cold weather. Where I live it doesn't get extremely cold, so I didn't need huge wool layers, I just wanted something that could be worn alone but also be worn layered underneath if needed. I finally found them in these pants! I went on a hike this morning, the temperature started at 35 degrees and ended at 50 degrees, which is roughly the coldest I hike in. They kept me warm, but didn't overheat me and make me sweat like other fleece pants I own.I'm 5'8 but have legs longer than my 6' husband, so finding pants to properly fit me is always a huge battle. Normally with exercise leggings I'm okay with them being a tad short, but since the purpose of these is warmth I really wanted them to be long enough to cover my ankles. I ordered the Longs and I am shocked and excited to say that they are super long! Even I need to either fold them over about two inches or let them bunch, which I don't mind at all. I'd much rather they be too long than too short. Today I folded them and then tucked them into my hiking socks and they felt great. I'm a solid size 6 and ordered the medium. The picture from the seller shows these pants going just below the belly button, which is my preferred style. As you can see in my picture, these go way higher than that on me, which I don't super love. I could fold them down, but with the waistband pockets it bunches weird when I fold it. If I'm being picky, I wish they had a bit more compression, at least in the waist. With the high waist and mild compression, it gives me a bit of a pooch in the midsection. But it isn't a huge deal, just my own vanity. The seam down the leg is a bit odd and wraps all the way around, which also isn't a huge deal, just weird and I hope doesn't cause odd chafing problems. Overall though, I'm extremely happy with these leggings. I'm going on a 15 mile hike this weekend and there is forecasted to have snow at the top, so I'm excited I'll have these to keep me warm!UPDATE: I've worn these leggings hiking multiple times in cold weather including once in 3 inches of snow, and I'm seriously obsessed. They kept me warm without overheating. I slipped on my bum twice in the snow and after I brushed the snow off my pants were completely dry. When we went sledding I wore these under a more waterproof shell and they were perfect. The too high waist/not enough belly compression still annoys me, but definitely worth it.