How should thermal cycling pants fit compared to my summer shorts?

Thermal pants should fit similarly to your summer shorts—close to the skin with no gaps or wrinkles—but the thicker fabric means they may feel slightly more restrictive initially. The key is maintaining contact between the fleece interior and your skin for effective insulation; loose areas allow cold air to circulate inside the garment. Some riders size up one size from their summer shorts for comfort, especially across the knees, but avoid sizing up too much or you'll lose the insulating benefit. Try them in your riding position to ensure the knees bend freely without restriction.