How do I layer properly with uninsulated stretch snow pants?

Start with a moisture-wicking base layer—merino wool or synthetic—fitted against your skin. For moderate cold, this may be sufficient under the shell. Add a lightweight mid-layer (fleece pants or insulated bottom) for colder conditions. The key is avoiding cotton, which traps moisture. Your layers should be trim enough to avoid bunching inside the stretch pants but not so tight that they restrict the stretch fabric's range. Adjust layers based on activity level—you will need less insulation for high-output touring than for sitting on cold lifts.