High performance starts here. Our men's short sleeve Endurance Base Layer SS is your first step in ensuring comfort that lasts and pushing your PRs with ease. This poly-spandex mesh top features form-fitting, four-way stretch with a Hydrolix fabric. It creates a layer of air between the top and your jersey while wicking moisture away, instantly. Layer it under any of our jersey's for the ultimate training sidekick that keeps you dry and cool to up-level your ride, mile after mile.