Take a second to look at what the folks around you have on. Chances are everyone-you included-is wearing something that 20 years ago would have been defined as workout clothes: hoodies, track jackets, technical tennis shoes. But these days, theyre such a natural part of everyday dressing that no one notices when you mix sports-centric elements into your look. Heres the 4 key athletic pieces that you can and should work into your daily outfits this season.