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Arc'teryx Bottoms Size Chart Arc'teryx Tops Size Chart For cool days or aerobic treks in the cold, insulation without breathability can turn your hike into a soggy mess. The Arc'teryx® Atom LT Jacket functions as an outer or midlayer based on the needs of the conditions for breathable, movement-mirroring insulation. Trim Fit is a motion-friendly cut with reduced fabric for minimal bulk. LT: Light Weight blends highly effective tech with lightweight, minimalist cut. Tyono™ 20 fabric:• Lightweight nylon taffeta offers durable, breathable performance.• Mechanical stretch for improved mobility.• DWR (durable water-repellent) finish provides water-resistant protection. Polartec® Power Stretch® with Hardface® Technology side panels:• Polartec fleece features a brushed back for warmth retention and active breathability.• Hardface Technology provides high abrasion resistance.• Four-way stretch for full range of motion.• Smooth face for water-resistant protection.• 6.8 oz/yd² / 230 g/m². Coreloft™ Compact Insulation:• Compact performance offers light insulation with low bulk.• Compressible, multidenier polyfill is siliconized for a hydrophobic finish.• 60 g/m² weight. Stand collar with zipper garage. Full zip with inner draft flap. No Slip Zip™ prevents the main zip from opening on its own. Long sleeves with elastic-paneled cuffs. Zip hand pockets. Inner zip pocket. Droptail hem with drawcord. Shell: 100% nylon;Insulation: 100% polyester;Lining: 100% nylon. Machine wash and tumble dry. Imported. Measurements: Length: 23 in Product measurements were taken using size SM. Please note that measurements may vary by size.