Workout clothing fitness vest is designed for a specific purpose. Whether it is wicking away sweats more effectively, keeping you warm or cool during activities, or simply being more breathable — these 'functions' help you as you go about your activities and exercises.
Is it better to workout with a shirt?
DON'T pick a cotton t-shirt. Cotton absorbs moisture easily, so you'll be stuck with a heavy, sticky shirt that can cause irritation and will get cold as soon as you're done exercising. Plus, baggy clothing is actually a safety risk since it can get caught in a machine.