When you're pushing hard on multi-day alpine missions, the Summit Casaval Hybrid Jacket delivers the technical performance that serious mountaineers demand. This innovative mid-layer features VENTRIX™ synthetic insulation with laser perforations that actively regulate your temperature during high-output activities, keeping you warm on belays but preventing overheating during demanding climbs. The jacket's seamless shoulder construction eliminates pressure points from heavy pack straps, while hybrid construction places stretchy, breathable panels under your arms for unrestricted mobility when you need to reach for that next hold. Whether you're tackling technical alpine routes or grinding through long approach days, this packable insulation layer adapts to your effort level and works seamlessly with your gear, making it an essential piece for any serious mountain athlete's kit.
