The Double Thick Pullover Sweatshirt is the only heavyweight hooded pullover you need in your life. Most heavyweight sweatshirts are 10-13 oz. We decided to double that and to create a truly heavyweight and super warm sweatshirt with: Two layers of thick, 13 oz. 100% Pre-shrunk Cotton Fleece Gusseted Armpits for freedom of movement Basically, it's the most well thought out and best made sweatshirt ever.