I am a BIG fan of being warm and cozy; however, I live in upstate NY, so the weather is ALL over the place. I also have two active young boys and a dog, so I am constantly outside. I started my (literal) collection of heated apparel years ago with an ORORO winter jacket and have since added several vests, sweatshirts, and a seat cushion. I thought I had reached the pinnacle of toastiness. Then I got these baselayer bottoms. Game changer. Now both my upper AND lower halves are heated when it’s freezing out and I need to sit through a sporting event, take the dog for a walk, wait for the school bus, attend an outdoor event/function (like this past week’s fun run and trunk-or-treat)… I have been wearing them even more than I imagined I would. They fit comfortably under pants and jeans (see photos), but I really can’t wait to wear them under my snowpants this winter! They fit true to size and feel just like wearing regular leggings with the added benefit of extra warmth (in three settings, like other Ororo products). The battery stores in a convenient little side pocket and does not feel super bulky or obtrusive. I also really like that the cord is braided for longevity/durability. If you’re someone who enjoys being (or someone who has to be) outside during cool or cold weather, I HIGHLY recommend these base layer pants--they do not disappoint.