Arc'teryx's Kyanite Lightweight Jacket is perfect for just about anything. This gorpcore essential is lightweight, breathable and warm - what more could you want? It's crafted from soft Torrentâ„¢ fleece that has a four way stretch and an anti-odour finish, ideal for active adventurers. 84% Polyester 16% Elastane, Torrentâ„¢ Fleece Fabric, Slim Fit, No Slip Zipâ„¢ Closure, 2 Side Pockets, Embroidered Logo, Arc'teryx. Arc'teryx Men's Kyanite Lightweight Jacket in Black Sapphire, Size X-Large