Every season brings its chill – summer included. The light, packable Cerium is your go-to for nights at camp, cold morning starts, and high-altitude rest stops. Its hybrid design strategically maps lofty 850 fill down for targeted insulation with air-permeableFortiusAir 50 softshell under the arms, down the sides, and around the waist for stretch and thermal regulation. An insulated StormHood adds warmth. The result is a versatile hoody delivering measured thermal performance, airflow, and freedom of movement.