The marching trousers use synthetic insulation around the full legs with venting that can be opened when warmer. The source’s suede wording is treated as surface appearance: the listed main fabric and filling are polyester, without an unlisted leather or cotton claim. Approximate everyday styling guide: 0°C–15°C. The temperature and humidity bands are qualitative clothing guidance, not laboratory ratings. This turbulence edition lists 100% polyester as its first fabric.