The Arc'teryx Women's Atom LT Jacket is a mid-layer jacket for cold weather hiking, Climbing, and skiing. The Atom LT has been packed with 60 grams of Coreloft Insulation, a hydrophobic, synthetic material that resists moisture. The LT stands for lightweight, and coupled with a hip length and trim Fit it cuts down on bulk without sacrificing warmth or Performance. Stretchy side panels courtesy of Polartec Power Stretch gives the jacket extra movement as well as breathability so you can stay comfortable on the trail and mountain all day long. The outer fabric resists abrasion as well as provides weather resistance due to the durable water repellent finish. The internal pocket zips shut to secure a headlamp inside so the batteries won't get cold, and the hand pockets zip as well to hang onto a second set of glove liners. The Atom can also function as a stand alone and won't say no to a chilly afternoon in town after a hard morning on the slopes. Features of the Arcteryx Women's Atom LT Jacket Light, soft taffeta face fabric has DWR finish to repel moisture and good air permeability for active use Low profile, stretch side panels made of Polartec Power Stretch provide trim Fit and help to regulate temperature during exertion Mid height collar is soft next to skin, insulated, and layers easily Two zippered hand pockets, internal zippered chest pocket Laminated, drop back hem for added coverage Filled with Coreloft synthetic Insulation made to be durable, lightweight, Highly compressible and to retain warmth when wet Articulated elbows and gusseted underarms for increased comfort and range of motion Full front zip with wind flap for added protection from the elements Trim Fit garments Are patterned with lower volume for reduced bulk Packs down into it's own pocket, or any other small space you can imagine (pickle jar) Ideal for use as a layering piece during cold weather activities Wind resistant Fine denier yarns allow ultra lightweight fabric configuration that is Highly wind resistant and strong Four-way stretch fabric that allows for excellent athletic movement and good breathability to maintain comfort Hardface Technology for a Higher level of abrasion resistance Highly crimped multi-denier siliconized Polyester yarn, this lightweight, breathable and thermally efficient Composite construction Stretch-knit cuffs Insulated mid layers made with hydrophobic synthetic material that resists absorbing moisture Available in different thicknesses for end-use Performance and comfort