I posted a similar question not long ago because I also HATE layers. I refuse to wear camisoles, leggings (!@@#! !), or anything uncomfortable and tight-fitting (i.e., anything that has to do with cold weather, which I also despise. Thankfully, I live in Texas
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I heard from a lot of people that fleece-lined jeans were worth looking into, or even heavy cloaks. I have also had success with really nice, thick sweatpants or even loose jacket layers.