The Black Diamond HighLine Stretch Pants are our most versatile, 3-layer mountain and alpine pants in our collection. The HighLine Pants feature a premier combination of our BD.dry™ waterproof/breathable protection and GTT’s revolutionary Empel Breathable Water Protection Technology, an environmentally friendly PFC-free water-repellant finish that is superior in performance compared to any other C-6, C-8, or C-0 DWR.