Details This trim hybrid hoody is designed as an active-use insulation layer, providing vital core warmth with liberal mobility and breathability. Lightweight and compressible, the Arc'teryx men's Atom LT Hoody features Coreloft™ insulation in the torso, arms and hood. The side panels and underarms feature feature smooth faced, air permeable fleece stretch for ventilation. A wind and moisture resistant outer shell extends stand-alone usability. Every person at Head Office owns at least one Atom LT; most of the women have two. The reason: Coreloft™ insulation inside a light taffeta shell. All the comfort of a sleeping bag, but it feels weightless.The benefit of taffeta fabrics is their light, airy nature with an ability to turn aside wind. The Atom series have a taffeta outer lining that is treated with DWR (durable water resistant) finish to give them a long-lasting ability to shed moisture. DWR protects against light precipitation. Mid layers that can function as outer layers have varied degrees of weather shedding capability; they also have varied degrees of moisture management. In addition to being made of breathable Coreloft™ insulation, the Atom LT has smooth faced, air permeable fleece stretch side panels to help regulate temperature during exertion. Highly compressible, Atom pieces pack down into a tiny parcel of stored warmth. Store the jacket inside its own pocket, or tuck it into a sleeve or inside the hood if you are not restricted by space. A quick shake restores the original loft, time and again. Material Tyono™ 20, 100% nylon - exterior shell Side panel fabric - 100% polyester Coreloft™ 60g/m² insulation Fit Trim fit Hip length Center back: 74cm/29in, drop hem Details Light, soft Tyono™ 20 has good air permeability; DWR finish repels moisture Coreloft™ 60 insulation provides warmth Smooth faced, air permeable fleece stretch side panels for ventilation Adjustable, insulated, low profile StormHood™ No Slip Zip™ main opening, Zippered hand pockets Internal zippered chest pocket Adjustable hem Weight 360g/12.7oz (Size M) Arc'teryx Atom LT Hoody Men's