Arc'teryx designed the women's Atom SL Hoody for light standalone protection while its form-fitting silhouette makes it a perfect mid layer. It features a compactable and DWR treated Tyono 20 face fabric. It's then padded with 40g of Coreloft Compact insulation. Coreloft padding is highly compressible, insulates when wet, and delivers an incredible warmth-to-weight ratio. The sleeves are lined with an airy mesh, while fleece stretch side panels enhance thermal performance and ventilation. This athletic hoody was made to move, with articulated sleeves, gusseted underarms, and a trim-fit, which increases breathability during high-output. An adjustable DWR treated StormHood offers a low-profile fit. The No Slip Zip front opening has a protective chin guard for next-to-skin comfort. Shaped sleeve cuffs utilize a stretchy fleece fabric for a snug feel.