Description of Arc'teryx Covert Collar Zip - Men's:
The Arc'teryx Men's Covert Collar is a sneaky little SOB. With its special knit, this pullover looks like a wool sweater, but it's actually a Polartec Thermal Pro fleece. The sophisticated appearance of wool combines with the performance and comfort of Polartec to create a truly do-anything fleece. This classically tailored sweater works wonderfully as a layer in winter weather or alone during the spring thaw. The collar zip adds ventilation, while the laminated stash pocket provides added convenience and style. *Available for US shipment only.
Bottom Line: Looks like wool, performs like the best fleece you'll ever own.
Comfortable piece, relaxed fit. No wind blocking, but it's a sweater, not a wind-breaker. Looks good enough to wear at the office over shirt and tie. Has a lose elastic closer at the wrists, and waist (no problems with it turning up at the waist because of this). Very good in cold conditions, yet I don't seem to overheat in moderate conditions or indoors. Slate color is grey/brown, looks more brown than shown on this site.