Arc'teryx operates with the belief that good design is the result of "instinct, discipline and discovery." This is channelled in the Atom Hooded Jacket which is long-proven to combat the elements. Coreloftâ„¢ Compact insulation contains warmth, even in wet conditions, with a helping hand from the water resistant Tyonoâ„¢ 20 face fabric. It's cut to a trim fit to stay close to the body, so it can fluidly move with you as a base layer or light mid-layer. An insulated StormHoodâ„¢ and signature branding at the chest finishes the look. 100% Nylon Tyonoâ„¢ 20 Denier Shell, 100% Polyester Coreloftâ„¢ Insulation, Durable Water Repellent Finish, Trim Fit, Laminated Hem, No Slip Zipâ„¢ Closure, Arc'teryx. Arc'teryx Men's Atom Hooded Jacket in Yukon, Size X-Small