Is it enough to exercise in your collection of boxy, oversized T-shirts? Of course it is. If that’s what you have on hand, that’s how you make do. I even ran a 5-kilometre race in an extra-large "Lord of the Rinks" shirt because it happened to be at the top of my laundry pile that day. But, if you're constantly toughing it out in cotton T-shirts, it might make sense to give your workout wardrobe a bit of an update. When you invest in well-made exercise apparel, you cash in on key functional and psychological advantages that impact the quality of your routine, your emotional wellbeing, and your long-term fitness goals. You won't have to empty your wallet to do this, either. Here are a few reasons why well-made workout clothes make us feel confident.