Using synthetic Ventrix™ The North Face Summit Casaval Men’s Hybrid Hoodie uses perforations throughout the back panel for dynamic venting paired with stretch-woven underarms and hem for mobility so you have extensive heat management for high energy activities in cold weather. Tailored to be pack friendly, without shoulder seams, this is designed to be comfortable even under heavy loads. With an adjustable hood fitted with a pre-tensioned elastic opening this stretches to fit securely over a helmet for extra protection.. Raglan sleeves and an underarm gusset paired with a combination of stretch fabric, stretch insulation, and clever design creates a piece with superior movement and an “hands up” flexibility without pulling. With a clean and lean aesthetic and low profile fit whether you’re sliding this under a shell for a day on skins, layering over tights for a workout on your skinny skis, or tapping it as a layer for running lift-served laps this is a multi-sport functional design providing warmth without bulk and amazing moisture management. A piece designed to keep you dry and warm when you’re running hot in the cold by keeping your core dry and insulated.