Your first trail 10K isn't going to train for itself. Get out there in the Arc'teryx Women's Thaleia Hooded Fleece Jacket, and train in comfort on blustery autumn days. This midweight pullover fleece hoodie stretches for comfort and has an excellent warmth to weight ratio. It is perfect for running or other high output activities and is a great under a shell when the weather turns nasty. A trim fit and low profile hood with wrap around collar provide performance and warmth without adding bulk. Flatlock construction reduces chafing and irritation, while thumbholes hold your sleeves in place. A zippered security pocket with locking slider keeps your keys or other essentials secure, and a media port gives you access to the tunes that inspire you to keep on running.