Navigate any trail with cutting-edge comfort When the forecast calls for cold winds, potential rainfall, and any weather you might consider “bleak”, a layer like the Graves PX Shell is essential for your running getup. The Graves PX Shell is crafted from our custom Toray Primeflex fabric—also used in our bestselling Graves PX running shorts—that’s light, wind- and water-resistant, and significantly more breathable than a rain jacket. While it’s a great line of defense against the elements, the modern, minimalist style easily transitions across your daily settings, making it a versatile part of your weekly wardrobe.