When you're out on a fast-paced training run, you want to feel quick and light from head to toe. This adidas running sweatshirt won't slow you down. Lightweight ripstop fabric is made with AEROREADY to manage moisture. Thumbhole cuffs hold the sleeves in place, and a watch window lets you keep track of your pace without breaking stride. When it's time to take it off, roll it up in its own pocket and stash it in your waist pack.