For intensive training sessions, you need full focus, and for that you should make good use of the adidas Team Base Base Layer Black & White. The very snug design ensures a super tight fit and the breathable material keeps you cool. This is because several parts of the base layer are equipped with mesh for maximum ventilation, such as the back, the bottom of the sleeves and the forearms. The adidas Team Base Base Layer has a round neck, raglan sleeves and flat seams for reduced chafing and skin irritation.