Start with a breathable base layer, add a lightweight knit or sweatshirt, then finish with a wool, quilted or shell piece depending on conditions. Hip-length jackets pair well with wider trousers, while slightly longer cuts balance slimmer denim or tailoring. If you plan to wear heavy knits, consider a style with a bit more room in the shoulders and chest. Always check the shoulder and sleeve measurements if you have broad frames or longer arms.