Perfect for training, especially running, the Peak Performance M Alum Light Long Sleeve T-Shirt features a mesh back panel for breathability and complete freedom of movement. Made from 100% recycled polyester and dyed using a technique that uses significantly less water than traditional dyeing methods, the T-shirt is made of 4-way stretch fabric. It's lightweight, quick-drying, and wicks moisture away from the skin. It features a subtle Peak Performance logo print on the front.