Description of Arcteryx Sigma LT Jacket Dual fabric fusion in the Sigma LT Jacket blocks the wind without overheating the core. WINDSTOPPER® fabric protects the front, while Arcteryx new Bonded Poly underarm panels channel excess heat away from the body. The high performance Arcteryx Sigma LT Jacket features no-lift gusseted underarms and laminated construction. During heart-pumping aerobic activities, the Sigma LT moderates rising internal and falling external temperatures. The Sigma LT is ideal for all cold weather adventures from ice skating to skiing to backcountry exploration. Fear no wind in the the Sigma LT jacket that excels in aerobic performance. Features: DWR finish Full front zip with interior windflap No-lift gusseted underarms Laminated hem drawcord Moulded Zipper Garages Soft brushed lined collar Two zippered hand pockets Waist length Lite Stretch Ripstop WINDSTOPPER® Bonded Poly Weight: 358g