The Arc'teryx Thorium Hoodie Jacket is your go-to gear for all things outdoorsy. It's versatile and high-performing, filled with 750 fill European grey goose down and Coreloftâ„¢ synthetic insulation to keep you warm. The Aratoâ„¢ nylon shell is tough but light, perfect for tackling the weather with a water repellent finish. And the helmet compatible hood? That gives you that extra bit of protection. Outer: Aratoâ„¢ 30 -100% Nylon, Insulation: 750 Fill Grey Goose Down, Moisture & Wind Resistant, Durable Water Repellent Finish, Packable, Helmet Compatible Hood, Zip Chest Pockets, Zip Closure, Adjustable Hem, Stretchy Cuffs. Arc'teryx Men's Thorium Hoodie Jacket in Lampyre, Size X-Large