Loved by A-listers with serious swag (think Kanye and Ryan Gosling) the sleeveless hoodie is an easy-going addition to your sportswear wardrobe. A versatile piece, it looks great on its own or paired with a basic long or short sleeved tee. Bit cold? No worries, simply layer it under a parka with the hood turned up. For extra detail, as well as flexibility, opt for styles that feature a zip. Post-workout, you need only swap your shorts for jeans, to create a smart casual look with zero effort.