Features of the Castelli Men's Perfetto Convertible Jacket Fully aero, fully breathable and fully protected Gore Windstopper X-Lite Plus fabric for lightweight total wind protection with water-repellent finish Remove the sleeves for a short-sleeved Perfetto Jersey Nano Flex fabric insert under arms Storm-flap construction with reflective logo at back protects from wheel spray Silicone gripper at waist prevents ride-up Full-length YKK Vislon zipper with wind flap 3 Rear pockets with laser-cut drain holes