Proton Vest Men’s

Arc'teryx Proton Vest is an ideal vest to adjust your thermal comfort during your oudoor activities. Made to balance air flow and insulation, the Proton Vest wraps the core to deliver warmth without overheating. Softshell durable, the Fortius Air 20 outer stretches, and balances moderate wind and weather protection with airflow. Octa Loft knit insulation provides warmth that resists packing out over time. The chest pocket is sized for a radio, and the trim fit layers easily under a shell.Updated with Octa Loft knit insulation and resized stretch chest pocket.