The Birkholm's vest silhouette features an adaptable Pertex® Quantum construction. Pertex® provides a soft windproof shell that retains heat at an impressive rate. Made with 50% recycled materials the shell is treated to a PFC-free DWR treatment for additional protection. RDS down insulation is strategically placed for comfort and warmth in transitioning seasons. Details include a zip placket an adjustable drawstring hem and zip pockets at the chest and sides.