It looks like wool. It even feels like wool but the highly successful and popular Arc'teryx Covert Cardigan covers you in a fast-drying and lightweight Polartec® Thermal Pro® sweater knit fabric that's superbly designed for skiing snowboarding snowshoeing and winter walks. The Arc'teryx Covert Cardigan is a fashionable alternative to the standard fleece-style appearance and fits in easily at work or out on cool social events. Unzip the full-length front zipper on sunny days and you're ready to chill.