Brooks Rock 'N' Roll San Jose Essential Womens 1/2 Zip T-Shirt Womens Helium Blue Looks just like cotton, but packed full of technical qualities, including powerful moisture management to keep you cool and dry Flatlock seams prevent chafing Soft, stretch fabric is great on its own or as a layer piece Semi-Fitted: Contours to the body 9" front zip with super soft zipper garage allows for added ventilation and comfort.