Built with a wind stopping micro polyester membrane, these are designed to keep the breeze off your front while letting you ventilate out the back. And with a DWR coating, you will stay dry as well. Packable down to the size of a single jersey back pocket, you can stow this away as the day warms up. • Micro polyester windproof front and arms
• Perforated breathable back promoting air flow
• Easy-pull two way zipper with full ventilation guard
• Silicone gripper around the lower back to keep things in place
• Designed for temperatures below 50˚F