I bought some Red Route Kevlar lined jeans a little while ago when I saw them online for $70. The denim is pretty thick. The stitching isn't that great. Some of the stitching in the front is already coming undone. The heat difference between wearing these or regular jeans is minimal (if there is a difference at all). Sure, they're not as thoroughly lined as Sartso Jeans (see below), but for $70 they're not that bad. I usually wear a Juniors' size 5-7, but after reading reviews on fit I ordered a women's size 8. They're kind of big which is okay since winter is approaching and I'll be able to wear some layers underneath.