Innovative fleece insulation provides breathable warmth, is soft next-to-skin, and has a unique hollow-core fibre construction delivering an exceptional warmth-to-weight ratio | Fleece's construction creates a smooth face for improved durability | Full zipper for easy on-and-off and rapid ventilation | Phasic™ AR II underarm panels provide added stretch, ventilation, and moisture management | Zippered laminated chest pocket secures small essentials | Chin guard protects chin and neck from chafing | Flatlock stitching and minimal seaming improve comfort | Regular fit with articulated patterning for mobility, comfort, and easy layering