Cotopaxi size their apparel to standard body measurements rather than a house fit block, so measure yourself and read the chart. Measure over something light and close-fitting so you're not adding bulk.

Their one clear rule: if you're between two sizes, take the next size up. That's also the sensible call if you'll wear an insulated piece over a fleece.

• Measure over light, close-fitting clothing — bulky layers push you into the wrong size.
• Between two sizes? Take the next size up.
• Size up if you plan to layer an insulated jacket or vest over a fleece.
• Measure chest or bust at the fullest part, waist at your natural waistline, hips at the fullest part, and inseam from crotch to floor with no shoes.