Fashion Clothing Shop the Essential Activewear Layer for Fall By Alexis Parente Alexis Parente Alexis Parente is a NYC-based writer and editor. She covers all things fashion, clothing, and shoes. InStyle's editorial guidelines Updated on September 10, 2017 @ 02:15PM Pin Share Tweet Email Trending Videos Photo: Courtesy Fall is here and winter is coming—cue the transitional clothing! If you've been feeling a little chilly in your usual tank top during your morning run, but overheat as soon as you don your favorite running sweatshirt, we've found a perfect solution. The vest is a happy medium that will keep you warm—but not too warm—during your outdoor workouts. Wear one over a t-shirt in the early fall, and come winter, try it over a long-sleeved tee, sweatshirt, or even a fleece on extra-cold days. Shop the perfect workout layering piece, below. 01 of 11 Adidas Stella McCartney Courtesy Buy Now 02 of 11 Arc'teryx Courtesy Buy Now 03 of 11 Tory Sport Courtesy Buy Now 04 of 11 LuluLemon Courtesy Buy Now 05 of 11 Uniqlo Courtesy Buy Now 06 of 11 Adidas Courtesy Buy Now 07 of 11 Aeance Courtesy Buy Now 08 of 11 Canada Goose Courtesy Buy Now 09 of 11 No Ka'Oi Courtesy Buy Now 10 of 11 Gap Courtesy Buy Now 11 of 11 The North Face Courtesy Buy Now